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descends is not well understood but it seems to be associated with the shortening of the gubernaculum. This is attached to the testis and extends through the inguinal canal to the wall of the scrotum as a testis. It carries with it the ductus deference, which are testicular vessels and nerves, a portion of the abdominal muscle, and lymph vessels. All of the structures remain attached to the testis and form what is known as the spermatic cord. By the time the testis is in the scrotal sac, the gubernaculum is no more than a remnant of scar like tissue.
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genitalia. This is caused by the androgens produced and secreted by the testes. Androgen induced development causes the elongation and differentiation of the phallus into a penis, a fusion of the urogenital folds surrounding the urethral groove along the ventral surface of the penis, and a midline closure of the labioscrotal folds. This closure forms the wall of the scrotum the external genitalia. The external genitalia are completely formed by the end of the 12th week.
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662:. This structure attaches to the inferior portion of the testis and extends to the labial sacral fold of the same side at the same time, a portion of the embryonic mesonephric duct adjacent to the testis becomes attached and convoluted informs the epididymis. Another portion of the mesonephric duct becomes the ductus deferens.
705:
organs and external genitalia will be male or female. This sequence is understandable in light of the fact that both male and female embryos develop within the maternal environment - high in estrogen secreted by the mother's ovaries and the placenta. If estrogen determined the gender, all embryos would become feminized.
863:. This occurs when one X chromosome contains a segment of the Y chromosome, which was inserted into the X chromosome of the father's sperm. Rarely females are born with the XY genotype. They are found to be missing the same portion of the Y chromosome as was inserted into the chromosome of XX males. The gene for
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of the paramesonephritic ducts 60 days after fertilization. Testosterone secretion by the interstitial cells of the testes then causes the growth and development of the mesonephric ducts into male secondary sex organs. The MĂĽllerian ducts atrophy, but traces of their anterior ends are represented by the
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Internal accessory sex organs to develop and most of these are derived from two systems of embryonic ducts. Male accessory organs are derived from mesonephric (wolfian) ducts. The developing tubules within the testes secretes a polypeptide MĂĽllerian inhibition factor (MIF). MIF causes the regression
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The genetic sex is determined by whether a Y bearing or next bearing sperm fertilizes the open; the presence or absence of a Y chromosome in turn determines whether the gonads of the embryo will be testes or ovaries; and the presence or absence of testes, finally, determines whether the sex accessory
960:
After the testes have differentiated, male sex hormones, called androgens, are secreted from interstitial cells (cells of Leydig). The major androgens secreted by these cells is testosterone and secretion begins 8 to 10 weeks after conception. Testosterone secretion reaches a peak at 12 to 14 weeks,
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The masculinization of the embryonic reproductive structures occurs as a result of testosterone secreted by the embryonic testes. Testosterone, however, is not the active agent within these organs. Once inside the target cells, testosterone is converted by means of an enzyme called 5α-reductase into
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The descent of the testes to its final location at the anterior abdominal wall, followed by the development of the gubernaculum, which subsequently pulls and translocates the testis down into the developing scrotum. Ultimately, the passageway closes behind the testis. A failure in this process can
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or an infantile hydrocoele. The testes descend into the scrotal sac between the sixth and 10th week. Descent does not occur until about the 28th week when compared to when canals form and the abdominal wall provides openings from the pelvic cavity to the scrotal sac. The process by which a testis
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The epididymis is a long whitish mass of tightly coiled tube. The sperm that are produced in the seminiferous tubules flow into the epididymis. During passage via the epididymis, the sperm undergo maturation and are concentrated by the action of ion channels located on the apical membrane of the
854:
Chromosomal abnormalities can occur during fertilization impacting the development of the male reproductive system. The genotype of the male consists of a Y chromosome paired with an X chromosome. Female sex is determined by the absence of a Y chromosome. Some individuals are male who have the
683:
The external genitalia of the male is distinct from those of the female by the end of the ninth week. Prior to that, the genital tubercle in both sexes is a phallus. The urethral groove forms on the ventral surface of the phallus early in development during the differentiation of the external
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At six weeks post-conception, the differentiation of the external genitalia in the male and female has not taken place. At eight weeks, a distinct phallus is present during the indifferent stage. By the 10th-12th week, the genitalia are distinctly male or female being and derived from their
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478:
The embryonic and prenatal development of the male reproductive system is the process whereby the reproductive organs grow, mature and are established. It begins with a single fertilized egg and culminates 38 weeks later with the birth of a male child. It is a part of the stages of
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At birth, the development of the prepubertal male reproductive system is completed. During the second trimester of pregnancy, testosterone secretion in the male declines so that at birth the testes are inactive. Gonadotropin secretion is low until the beginning of puberty.
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in the developing male. Before seven weeks after fertilization, the gonads have the potential to become either testes or ovaries. Reproductive sex organs for both male and female are derived from the same embryonic tissues and are considered homologous tissues or organs.
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The seminal vesicles form from lateral outgrowths of the caudal and of each mesonephric duct the prostate gland arises from an Indo dermal outgrowth of the urogenital sinus the bulbourethral glands develop from outgrowths in the membrane-like portion of the urethra.
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Genetic sex determines whether the gonads will be testes or ovaries. In the developing embryo if the testes are developed, it will produce and secrete male sex hormones during late embryonic development and cause the secondary sex organs of the male to develop.
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During puberty, increased gonadotropin secretion stimulates a rise in sex steroids creation from the testes. The increased secretion of testosterone from the testes during puberty causes the male secondary sexual characteristics to be manifested.
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External distinctions are not observed even by the eighth week of pre-embryonic development. This is the indifferent stage during which the gonads are relatively large and have an outer cortex of primitive sex cords and an inner medulla.
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and declines to very low levels by the end of the second trimester (about 21 weeks). Levels are the barely detectable 4–6 months of age postnatal. High levels of testosterone will not appear again until the time of puberty.
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The observable, visual differences become apparent between male or the female reproductive organs are not seen initially. Maturation continues as the medial aspect of each mesonephros grows to form the
871:(TDF), is located on the short arm of the Y chromosome. The presence or absence of the Y chromosome determines whether the embryo will have testes or ovaries. An abnormal number of sex chromosomes (
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The vas deferens, which is also known as the sperm duct, is a thin tube approximately 30 centimetres (0.98 ft) long that starts from the epididymis to the pelvic cavity. It carries the
317:
The scrotum is a sac of skin that hangs behind the penis. It holds and protects the testicles. It also contains numerous nerves and blood vessels. During times of lower temperatures, the
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gives it a wrinkled appearance; when the temperature increases, the cremaster and dartos fascia relax to bring down the scrotum away from the body and remove the wrinkles respectively.
696:
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Sharma S, Hanukoglu A, Hanukoglu I (2018). "Localization of epithelial sodium channel (ENaC) and CFTR in the germinal epithelium of the testis, Sertoli cells, and spermatozoa".
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At nine weeks, male differentiation of the gonads and the testes is well underway. Internal changes include the formation of the tubular seminar Chris tubules in the
120:
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FORD, CE; JONES, KW; POLANI, PE; DE ALMEIDA, JC; BRIGGS, JH (Apr 4, 1959). "A sex-chromosome anomaly in a case of gonadal dysgenesis (Turner's syndrome)".
615:, and the other embryonic structures differentiate into the external genitalia. In the absence of testicular secretions, the female genitalia are formed.
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Sharma S, Hanukoglu I (2019). "Mapping the sites of localization of epithelial sodium channel (ENaC) and CFTR in segments of the mammalian epididymis".
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Specialized primordial germ cells are forming and migrating from the yolk sac to the embryonic gonads during week eight and nine. These are the
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A.—Diagram of the primitive urogenital organs, from 'Diagrams to show the development of male and female generative organs from a common type'
483:. The development of the male reproductive system coincides with the urinary system. Their development can also be described together as the
96:
1905:
Fauci, Anthony S.; Braunwald, Eugene; Kasper, Dennis L.; Hauser, Stephen L.; Longo, Dan L.; Jameson, J. Larry; Loscalzo, Joseph (2008).
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Swaab DF, Garcia-Falgueras A (2009). "Sexual differentiation of the human brain in relation to gender identity and sexual orientation".
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921:. The genital ridge continues to grow behind the developing peritoneal membrane. By week six, string-like cell congregations called
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are filled with blood. The arteries of the penis are dilated while the veins are compressed so that blood flows into the erectile
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387:, and synthesize and secrete androgens that regulate the male reproductive functions. The site of production of androgens is the
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form within the enlarging genital ridge. Externally, a swelling called the genital tubercle appears above the cloacal membrane.
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This article is about the human male reproductive system. For the male reproductive systems of other organisms, see
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from the primary sex cord. Developing on the outside surface of each testis is a Phibro muscular cord called the
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will develop. A sperm cell carrying a Y chromosome results in an XY combination, and a male child will develop.
1895:
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1530:"A gene from the human sex-determining region encodes a protein with homology to a conserved DNA-binding motif"
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340:, vein and nerve bound together with connective tissue passes into the testis through inguinal canal.)
211:
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Forest MG, Cathiard AM, Bertrand JA (July 1973). "Evidence of testicular activity in early infancy".
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Three accessory glands provide fluids that lubricate the duct system and nourish the sperm cells.
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Corbier P, Edwards DA, Roffi J (1992). "The neonatal testosterone surge: a comparative study".
1328:"Hydroceles and Inguinal Hernia: Symptoms, Diagnosis & Treatment - Urology Care Foundation"
841:
127:
103:
91:
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459:: a gland located below the bladder that produces seminal fluid and helps regulate urine flow.
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Rediscovering
Biology, Unit 11 - Biology of Sex and Gender, Expert interview transcripts,
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Knowledge articles incorporating text from the 20th edition of Gray's
Anatomy (1918)
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the dihydrotestosterone (DHT). DHT mediates the androgen effect in these organs.
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1872:. Medical Gross Anatomy Atlas Images. University of Michigan Medical School. 1997
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structures. At 16 weeks post-conception, the genitalia are formed and distinct.
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Image showing innervation and blood supply of the human external male genitalia
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1606:(4th ed.). Philadelphia: Churchill Livingstone/Elsevier. pp. 307–9.
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The scrotum remains connected with the abdomen or pelvic cavity through the
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chromosome pairs, both the female (XX) and male (XY) versions of the two
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containing either an X or Y chromosome. If this sperm cell contains an
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156:. These organs are located on the outside of the body, and within the
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Schoenwolf, Gary C. (2009). "Development of the
Urogenital system".
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that are located in the interstitium between seminiferous tubules.
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1890:. Whitehouse Station, New Jersey: Merck Research Laboratories.
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contracts and pulls the scrotum closer to the body, while the
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1999:
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Secondary development includes the increased activity of the
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The structures are masculinized by secretions of the testes:
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along with the darkening of the skin in the scrotal region.
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Chart of the generalized male reproductive system embryionic
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1983:
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of the male), while their terminal fused portions form the
780:
559:
533:
192:
1909:(17th ed.). McGraw-Hill Medical. pp. 2339–2346.
1904:
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1181:
576:
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2070:
536:
1453:
Child and
Adolescent Development: An Integrated Approach
1095:
772:; adult males are taller than adult females, on average.
1673:
891:. Other less common chromosomal arrangements include:
352:
Labelled illustration of human internal male genitalia
3472:
1887:
The Merck Manual of
Medical Information; Home Edition
1773:"Embryology, Mullerian Ducts (Paramesonephric Ducts)"
1743:
883:- two X chromosomes and a Y chromosome are present,
1708:
1216:"Differentiation of the urogenital sinus in males"
485:development of the urinary and reproductive organs
226:External male genitalia; a human penis and scrotum
1528:Sinclair, Andrew H.; et al. (19 July 1990).
1479:
1477:
3496:
1827:Van de Graaff, Kent M.; Fox, Stuart Ira (1989).
1826:
1395:
1383:
1368:
1314:
1270:
1258:
1202:
1779:, Treasure Island (FL): StatPearls Publishing,
1138:
1833:. Dubuque, Iowa: William C. Brown Publishers.
1474:
1449:
2764:
1939:
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1091:
1089:
383:by meiotic division of germ cells within the
299:under pressure. The penis is supplied by the
2778:
1953:
1737:
1445:
1443:
1441:
1439:
1437:
1435:
1284:"Differentiated stage of the male genitalia"
827:
723:Male secondary sex characteristics include:
453:that secrete many of the semen's components.
249:, an enlarged bulbous-shaped tip called the
1702:
1667:
1595:
1234:"The external genitalia, indifferent stage"
1132:
210:The corresponding system in females is the
195:in the female's body; the fertilized ovum (
2771:
2757:
1946:
1932:
1907:Harrison's Principles of Internal Medicine
1601:
1086:
45:
1771:Wilson, Danielle; Bordoni, Bruno (2024),
1499:
1432:
1344:
465:: add fluid to semen during ejaculation (
1854:. New York, New York: Harper & Row.
1830:Concepts of Human Anatomy and Physiology
1527:
951:
927:
905:
845:
831:
822:
494:
355:
347:
257:for protection. Inside the penis is the
221:
836:Sex chromosomes in XO sex determination
678:
577:Other embryonic reproductive structures
490:
14:
3497:
1812:This article incorporates text in the
912:* w, w. Right and left Wolffian ducts.
618:
2752:
1927:
1848:Elson, Lawrence; Kapit, Wynn (1977).
800:and chest; shoulders wider than hips.
343:
217:
27:Reproductive system of the human male
1407:
1401:
879:- a single X chromosome is present,
611:The prostate gland derives from the
981:. This is due to the production of
431:
272:. Both substances exit through the
152:that play a role in the process of
24:
695:
409:
25:
3521:
1236:. Human Embryology: Organogenesis
528:Sexual identity is determined at
163:The main male sex organs are the
3482:
1883:
1806:
1711:Arch Int Physiol Biochim Biophys
1286:. Human Embryology Organogenesis
1054:Evolution of sexual reproduction
1035:
1023:
1011:
999:
865:sexual differentiation in humans
803:Increased secretions of oil and
761:(Adam's apple) and deepening of
40:Male reproductive system (human)
3165:Trabeculae of corpus spongiosum
3155:Trabeculae of corpora cavernosa
1800:
1764:
1620:
1576:
1521:
1450:Bjorklund DF, Blasi CH (2011).
1320:
936:extends to the midventral line.
861:androgen insensitivity syndrome
394:
3510:Human male reproductive system
1276:
1226:
1208:
1141:Journal of Molecular Histology
1098:Journal of Molecular Histology
473:
13:
1:
1641:10.1016/S0140-6736(59)91893-8
1079:
1042:External male genital organs
1884:Berkow, Robert, ed. (1977).
1396:Van de Graaff & Fox 1989
1384:Van de Graaff & Fox 1989
1369:Van de Graaff & Fox 1989
1315:Van de Graaff & Fox 1989
1271:Van de Graaff & Fox 1989
1259:Van de Graaff & Fox 1989
1203:Van de Graaff & Fox 1989
554:it will coincide with the X
364:
203:, which is later born as an
7:
3296:Internal urethral sphincter
1868:
1507:"Secondary Characteristics"
1047:
875:) can occur. This includes
424:from the epididymis to the
73:systema genitale masculinum
10:
3526:
3431:Posterior scrotal arteries
1847:
1676:J. Clin. Endocrinol. Metab
1153:10.1007/s10735-019-09813-3
992:
839:
712:
708:
691:
639:
543:has been initialized by a
519:
435:
413:
398:
368:
310:
306:
234:
212:female reproductive system
29:
3426:Anterior scrotal arteries
3401:Internal spermatic fascia
3386:External spermatic fascia
3363:
3345:External urethral orifice
3326:External sphincter muscle
3301:Internal urethral orifice
3108:
3099:
3028:
2920:
2872:
2804:
2795:
2786:
2703:
2626:
2588:
2465:
2408:
2367:
2332:
2273:
2210:
2170:
2161:
2129:
2101:
1974:
1965:
1723:10.3109/13813459209035274
1604:Larsen's human embryology
1416:Houghton Mifflin Harcourt
1110:10.1007/s10735-018-9759-2
869:testis determining factor
828:Chromosomal abnormalities
642:Development of the gonads
635:
126:
114:
102:
90:
78:
66:
61:
56:
44:
39:
3446:Posterior scrotal nerves
3249:Internal pudendal artery
2780:Male reproductive system
1816:from the 20th edition of
672:indirect inguinal hernia
449:: two glands behind the
230:
148:consists of a number of
146:male reproductive system
51:Male reproductive system
18:Male reproductive organs
3458:Posterior scrotal veins
3441:Anterior scrotal nerves
3269:Internal pudendal veins
2933:Tubuli seminiferi recti
2398:Lymphoid immune system
1967:Musculoskeletal system
1411:CliffsNotes AP Biology
1352:"Embryo Images Online"
983:anti-MĂĽllerian hormone
957:
937:
913:
881:Klinefelter's syndrome
851:
842:Chromosome abnormality
837:
701:
525:
481:sexual differentiation
375:The testicles are two
361:
353:
227:
128:Anatomical terminology
2386:Myeloid immune system
2172:Cardiovascular system
1870:"Gross Anatomy Image"
1688:10.1210/jcem-37-1-148
1332:www.urologyhealth.org
1184:, pp. 2339–2346.
955:
931:
909:
849:
835:
823:Clinical significance
699:
520:Further information:
498:
359:
351:
225:
171:, which contains the
3087:Bulbourethral glands
2928:Seminiferous tubules
2864:Blood–testis barrier
2738:Islets of Langerhans
2598:Genitourinary system
2334:Integumentary system
1851:The Anatomy Coloring
1495:on February 8, 2009.
1460:. pp. 152–153.
1356:syllabus.med.unc.edu
977:on the floor of the
971:hydatids of Morgagni
813:eccrine sweat glands
646:Paramesonephric duct
516:mitochondrial genome
491:Sexual determination
463:Bulbourethral glands
438:Male accessory gland
385:seminiferous tubules
183:, which, as part of
3350:Lacunae of Morgagni
3138:Suspensory ligament
3011:Testicular arteries
2887:Spermatocytogenesis
2628:Reproductive system
2347:Subcutaneous tissue
2116:Cartilaginous joint
1546:1990Natur.346..240S
1069:Reproductive system
923:primitive sex cords
619:External structures
261:, which is used to
32:reproductive system
3396:Cremasteric fascia
3133:Fundiform ligament
3060:Seminal colliculus
3006:Rectovesical pouch
2987:Pampiniform plexus
2965:Superior ligaments
2960:Inferior ligaments
2410:Respiratory system
2163:Circulatory system
1589:2018-07-28 at the
958:
938:
914:
852:
838:
793:mass and strength.
702:
679:External genitalia
606:labioscrotal folds
526:
518:(at bottom left).
362:
354:
344:Internal genitalia
279:The penis becomes
243:intromittent organ
228:
218:External genitalia
199:) develops into a
185:sexual intercourse
154:human reproduction
3470:
3469:
3466:
3465:
3160:Corpus spongiosum
3150:Corpora cavernosa
3095:
3094:
3065:Ejaculatory ducts
3024:
3023:
2897:Spermatidogenesis
2746:
2745:
2269:
2268:
2259:Glymphatic system
2157:
2156:
1662:Fauci et al. 2008
1540:(6281): 240–244.
1220:www.embryology.ch
1182:Fauci et al. 2008
979:prostatic urethra
967:appendices testis
893:triple X syndrome
877:Turner's syndrome
850:YChromShowingSRY2
514:, as well as the
293:corpus spongiosum
289:corpora cavernosa
142:
141:
137:
16:(Redirected from
3517:
3487:
3486:
3478:
3234:Arteries of bulb
3216:Tunica albuginea
3106:
3105:
3038:Seminal vesicles
3030:Accessory glands
3016:Testicular veins
2827:Tunica vasculosa
2822:Tunica albuginea
2817:Tunica vaginalis
2802:
2801:
2793:
2792:
2773:
2766:
2759:
2750:
2749:
2705:Endocrine system
2467:Digestive system
2212:Lymphatic system
2195:Lymphatic vessel
2168:
2167:
1972:
1971:
1948:
1941:
1934:
1925:
1924:
1920:
1901:
1880:
1878:
1877:
1865:
1844:
1810:
1809:
1794:
1793:
1792:
1791:
1768:
1762:
1761:
1741:
1735:
1734:
1706:
1700:
1699:
1671:
1665:
1659:
1653:
1652:
1624:
1618:
1617:
1599:
1593:
1580:
1574:
1573:
1554:10.1038/346240a0
1525:
1519:
1518:
1513:. Archived from
1503:
1497:
1496:
1491:. Archived from
1489:www.hartnell.edu
1481:
1472:
1471:
1458:Cengage Learning
1447:
1430:
1429:
1414:(5th ed.).
1408:Pack PE (2016).
1405:
1399:
1398:, p. 933-4.
1393:
1387:
1381:
1372:
1366:
1360:
1359:
1348:
1342:
1341:
1339:
1338:
1324:
1318:
1312:
1295:
1294:
1292:
1291:
1280:
1274:
1268:
1262:
1256:
1245:
1244:
1242:
1241:
1230:
1224:
1223:
1212:
1206:
1200:
1185:
1179:
1173:
1172:
1136:
1130:
1129:
1093:
1059:Male infertility
1039:
1027:
1015:
1006:Perspective view
1003:
857:XX male syndrome
817:sebaceous glands
650:Mesonephric duct
613:urogenital sinus
601:cloacal membrane
596:urogenital folds
591:genital tubercle
586:urogenital sinus
447:Seminal vesicles
432:Accessory glands
426:ejaculatory duct
338:spermatic artery
319:cremaster muscle
241:The penis is an
134:edit on Wikidata
131:
49:
37:
36:
21:
3525:
3524:
3520:
3519:
3518:
3516:
3515:
3514:
3495:
3494:
3493:
3481:
3473:
3471:
3462:
3359:
3355:Urethral glands
3333:Navicular fossa
3284:Pudendal nerves
3239:Dorsal arteries
3091:
3020:
2994:Vasa deferentia
2982:Spermatic cords
2916:
2874:Spermatogenesis
2868:
2782:
2777:
2747:
2742:
2699:
2661:Seminal vesicle
2622:
2584:
2534:Small intestine
2461:
2404:
2363:
2328:
2265:
2206:
2153:
2131:Muscular system
2125:
2097:
1976:Skeletal system
1961:
1952:
1917:
1898:
1875:
1873:
1862:
1841:
1807:
1803:
1798:
1797:
1789:
1787:
1769:
1765:
1742:
1738:
1707:
1703:
1672:
1668:
1660:
1656:
1635:(7075): 711–3.
1625:
1621:
1614:
1600:
1596:
1591:Wayback Machine
1581:
1577:
1526:
1522:
1505:
1504:
1500:
1485:"Help is here!"
1483:
1482:
1475:
1468:
1448:
1433:
1426:
1418:. p. 219.
1406:
1402:
1394:
1390:
1382:
1375:
1367:
1363:
1350:
1349:
1345:
1336:
1334:
1326:
1325:
1321:
1313:
1298:
1289:
1287:
1282:
1281:
1277:
1269:
1265:
1257:
1248:
1239:
1237:
1232:
1231:
1227:
1214:
1213:
1209:
1201:
1188:
1180:
1176:
1137:
1133:
1094:
1087:
1082:
1074:Spermatogenesis
1050:
1043:
1040:
1031:
1028:
1019:
1016:
1007:
1004:
995:
989:of the testes.
911:
844:
830:
825:
757:Enlargement of
717:
711:
694:
681:
652:
640:Main articles:
638:
621:
579:
524:
512:sex chromosomes
493:
476:
440:
434:
418:
412:
410:Vasa deferentia
403:
397:
373:
367:
346:
315:
309:
301:pudendal artery
268:and to excrete
239:
233:
220:
138:
52:
35:
28:
23:
22:
15:
12:
11:
5:
3523:
3513:
3512:
3507:
3492:
3491:
3468:
3467:
3464:
3463:
3461:
3460:
3455:
3454:
3453:
3451:Perineal nerve
3448:
3443:
3435:
3434:
3433:
3428:
3420:
3415:
3410:
3405:
3404:
3403:
3398:
3393:
3388:
3383:
3378:
3369:
3367:
3361:
3360:
3358:
3357:
3352:
3347:
3342:
3341:
3340:
3330:
3329:
3328:
3323:
3318:
3313:
3308:
3303:
3298:
3288:
3287:
3286:
3281:
3273:
3272:
3271:
3266:
3261:
3253:
3252:
3251:
3246:
3241:
3236:
3228:
3223:
3218:
3213:
3212:
3211:
3206:
3196:
3195:
3194:
3192:Septum glandis
3189:
3184:
3179:
3169:
3168:
3167:
3162:
3157:
3152:
3142:
3141:
3140:
3135:
3130:
3125:
3114:
3112:
3103:
3097:
3096:
3093:
3092:
3090:
3089:
3084:
3083:
3082:
3077:
3072:
3067:
3062:
3057:
3055:Urethral crest
3047:
3046:
3045:
3043:Excretory duct
3034:
3032:
3026:
3025:
3022:
3021:
3019:
3018:
3013:
3008:
3003:
3002:
3001:
2991:
2990:
2989:
2979:
2974:
2973:
2972:
2967:
2962:
2957:
2947:
2946:
2945:
2943:Efferent ducts
2940:
2935:
2924:
2922:
2918:
2917:
2915:
2914:
2909:
2907:Spermiogenesis
2904:
2899:
2894:
2889:
2884:
2882:Spermatogonium
2878:
2876:
2870:
2869:
2867:
2866:
2861:
2856:
2851:
2846:
2841:
2836:
2831:
2830:
2829:
2824:
2819:
2810:
2808:
2799:
2790:
2784:
2783:
2776:
2775:
2768:
2761:
2753:
2744:
2743:
2741:
2740:
2735:
2730:
2725:
2720:
2715:
2709:
2707:
2701:
2700:
2698:
2697:
2696:
2695:
2690:
2685:
2680:
2675:
2665:
2664:
2663:
2658:
2653:
2648:
2643:
2632:
2630:
2624:
2623:
2621:
2620:
2615:
2610:
2605:
2600:
2594:
2592:
2590:Urinary system
2586:
2585:
2583:
2582:
2581:
2580:
2575:
2570:
2558:
2557:
2556:
2551:
2546:
2541:
2536:
2526:
2525:
2524:
2519:
2514:
2512:Laryngopharynx
2509:
2499:
2498:
2497:
2492:
2487:
2482:
2480:Salivary gland
2471:
2469:
2463:
2462:
2460:
2459:
2458:
2457:
2452:
2447:
2437:
2436:
2435:
2430:
2425:
2414:
2412:
2406:
2405:
2403:
2402:
2401:
2400:
2390:
2389:
2388:
2377:
2375:
2373:immune systems
2369:Haematopoietic
2365:
2364:
2362:
2361:
2360:
2359:
2349:
2344:
2338:
2336:
2330:
2329:
2327:
2326:
2321:
2319:Somatic system
2316:
2315:
2314:
2309:
2302:Sensory system
2299:
2298:
2297:
2292:
2287:
2279:
2277:
2275:Nervous system
2271:
2270:
2267:
2266:
2264:
2263:
2262:
2261:
2254:CNS equivalent
2251:
2250:
2249:
2244:
2234:
2233:
2232:
2227:
2216:
2214:
2208:
2207:
2205:
2204:
2199:
2198:
2197:
2192:
2187:
2176:
2174:
2165:
2159:
2158:
2155:
2154:
2152:
2151:
2146:
2141:
2135:
2133:
2127:
2126:
2124:
2123:
2121:Synovial joint
2118:
2113:
2107:
2105:
2099:
2098:
2096:
2095:
2090:
2089:
2088:
2083:
2078:
2073:
2068:
2063:
2058:
2053:
2048:
2043:
2038:
2033:
2028:
2023:
2018:
2013:
2008:
2003:
1997:
1991:
1980:
1978:
1969:
1963:
1962:
1951:
1950:
1943:
1936:
1928:
1922:
1921:
1915:
1902:
1896:
1881:
1866:
1860:
1845:
1839:
1824:
1819:Gray's Anatomy
1802:
1799:
1796:
1795:
1763:
1736:
1701:
1666:
1654:
1619:
1612:
1594:
1575:
1520:
1517:on 2011-09-27.
1498:
1473:
1467:978-1133168379
1466:
1431:
1425:978-0544784178
1424:
1400:
1388:
1386:, p. 934.
1373:
1371:, p. 933.
1361:
1343:
1319:
1317:, p. 932.
1296:
1275:
1273:, p. 929.
1263:
1261:, p. 928.
1246:
1225:
1207:
1205:, p. 927.
1186:
1174:
1147:(2): 141–154.
1131:
1104:(2): 195–208.
1084:
1083:
1081:
1078:
1077:
1076:
1071:
1066:
1061:
1056:
1049:
1046:
1045:
1044:
1041:
1034:
1032:
1029:
1022:
1020:
1017:
1010:
1008:
1005:
998:
994:
991:
840:Main article:
829:
826:
824:
821:
809:
808:
801:
796:Broadening of
794:
787:
773:
766:
755:
748:
713:Main article:
710:
707:
693:
690:
680:
677:
637:
634:
620:
617:
609:
608:
603:
598:
593:
588:
578:
575:
492:
489:
475:
472:
471:
470:
460:
457:Prostate gland
454:
436:Main article:
433:
430:
414:Main article:
411:
408:
399:Main article:
396:
393:
369:Main article:
366:
363:
345:
342:
336:, formed from
334:spermatic cord
330:inguinal canal
311:Main article:
308:
305:
285:sexual arousal
235:Main article:
232:
229:
219:
216:
140:
139:
130:
124:
123:
118:
112:
111:
106:
100:
99:
94:
88:
87:
82:
76:
75:
70:
64:
63:
59:
58:
54:
53:
50:
42:
41:
26:
9:
6:
4:
3:
2:
3522:
3511:
3508:
3506:
3503:
3502:
3500:
3490:
3485:
3480:
3479:
3476:
3459:
3456:
3452:
3449:
3447:
3444:
3442:
3439:
3438:
3436:
3432:
3429:
3427:
3424:
3423:
3421:
3419:
3416:
3414:
3411:
3409:
3406:
3402:
3399:
3397:
3394:
3392:
3389:
3387:
3384:
3382:
3381:Dartos fascia
3379:
3377:
3374:
3373:
3371:
3370:
3368:
3366:
3362:
3356:
3353:
3351:
3348:
3346:
3343:
3339:
3336:
3335:
3334:
3331:
3327:
3324:
3322:
3319:
3317:
3314:
3312:
3309:
3307:
3306:Pre-prostatic
3304:
3302:
3299:
3297:
3294:
3293:
3292:
3289:
3285:
3282:
3280:
3279:Dorsal nerves
3277:
3276:
3274:
3270:
3267:
3265:
3262:
3260:
3257:
3256:
3254:
3250:
3247:
3245:
3244:Deep arteries
3242:
3240:
3237:
3235:
3232:
3231:
3229:
3227:
3224:
3222:
3219:
3217:
3214:
3210:
3207:
3205:
3202:
3201:
3200:
3197:
3193:
3190:
3188:
3185:
3183:
3180:
3178:
3175:
3174:
3173:
3170:
3166:
3163:
3161:
3158:
3156:
3153:
3151:
3148:
3147:
3146:
3143:
3139:
3136:
3134:
3131:
3129:
3126:
3124:
3121:
3120:
3119:
3116:
3115:
3113:
3111:
3107:
3104:
3102:
3098:
3088:
3085:
3081:
3078:
3076:
3073:
3071:
3068:
3066:
3063:
3061:
3058:
3056:
3053:
3052:
3051:
3048:
3044:
3041:
3040:
3039:
3036:
3035:
3033:
3031:
3027:
3017:
3014:
3012:
3009:
3007:
3004:
3000:
2997:
2996:
2995:
2992:
2988:
2985:
2984:
2983:
2980:
2978:
2977:Paradidymides
2975:
2971:
2968:
2966:
2963:
2961:
2958:
2956:
2953:
2952:
2951:
2948:
2944:
2941:
2939:
2936:
2934:
2931:
2930:
2929:
2926:
2925:
2923:
2919:
2913:
2910:
2908:
2905:
2903:
2900:
2898:
2895:
2893:
2890:
2888:
2885:
2883:
2880:
2879:
2877:
2875:
2871:
2865:
2862:
2860:
2859:Sertoli cells
2857:
2855:
2852:
2850:
2847:
2845:
2842:
2840:
2837:
2835:
2832:
2828:
2825:
2823:
2820:
2818:
2815:
2814:
2812:
2811:
2809:
2807:
2803:
2800:
2798:
2797:Seminal tract
2794:
2791:
2789:
2785:
2781:
2774:
2769:
2767:
2762:
2760:
2755:
2754:
2751:
2739:
2736:
2734:
2731:
2729:
2726:
2724:
2721:
2719:
2716:
2714:
2711:
2710:
2708:
2706:
2702:
2694:
2691:
2689:
2686:
2684:
2681:
2679:
2676:
2674:
2671:
2670:
2669:
2666:
2662:
2659:
2657:
2654:
2652:
2649:
2647:
2644:
2642:
2639:
2638:
2637:
2634:
2633:
2631:
2629:
2625:
2619:
2616:
2614:
2611:
2609:
2606:
2604:
2601:
2599:
2596:
2595:
2593:
2591:
2587:
2579:
2576:
2574:
2573:Biliary tract
2571:
2569:
2566:
2565:
2564:
2563:
2559:
2555:
2552:
2550:
2547:
2545:
2542:
2540:
2537:
2535:
2532:
2531:
2530:
2527:
2523:
2520:
2518:
2515:
2513:
2510:
2508:
2505:
2504:
2503:
2500:
2496:
2493:
2491:
2488:
2486:
2483:
2481:
2478:
2477:
2476:
2473:
2472:
2470:
2468:
2464:
2456:
2453:
2451:
2448:
2446:
2443:
2442:
2441:
2438:
2434:
2431:
2429:
2426:
2424:
2421:
2420:
2419:
2416:
2415:
2413:
2411:
2407:
2399:
2396:
2395:
2394:
2391:
2387:
2384:
2383:
2382:
2379:
2378:
2376:
2374:
2370:
2366:
2358:
2357:Mammary gland
2355:
2354:
2353:
2350:
2348:
2345:
2343:
2340:
2339:
2337:
2335:
2331:
2325:
2322:
2320:
2317:
2313:
2310:
2308:
2305:
2304:
2303:
2300:
2296:
2293:
2291:
2288:
2286:
2283:
2282:
2281:
2280:
2278:
2276:
2272:
2260:
2257:
2256:
2255:
2252:
2248:
2245:
2243:
2240:
2239:
2238:
2235:
2231:
2228:
2226:
2223:
2222:
2221:
2218:
2217:
2215:
2213:
2209:
2203:
2200:
2196:
2193:
2191:
2188:
2186:
2183:
2182:
2181:
2178:
2177:
2175:
2173:
2169:
2166:
2164:
2160:
2150:
2147:
2145:
2142:
2140:
2137:
2136:
2134:
2132:
2128:
2122:
2119:
2117:
2114:
2112:
2111:Fibrous joint
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1995:
1992:
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1987:
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1960:
1956:
1955:Human systems
1949:
1944:
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1937:
1935:
1930:
1929:
1926:
1918:
1916:9780071466332
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1815:
1814:public domain
1805:
1804:
1786:
1782:
1778:
1774:
1767:
1759:
1755:
1751:
1747:
1746:Funct. Neurol
1740:
1732:
1728:
1724:
1720:
1717:(2): 127–31.
1716:
1712:
1705:
1697:
1693:
1689:
1685:
1682:(1): 148–51.
1681:
1677:
1670:
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1615:
1613:9780443068119
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1111:
1107:
1103:
1099:
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1067:
1065:
1064:Oncofertility
1062:
1060:
1057:
1055:
1052:
1051:
1038:
1033:
1026:
1021:
1018:Sagittal view
1014:
1009:
1002:
997:
996:
990:
988:
987:Sertoli cells
984:
980:
976:
972:
968:
962:
954:
950:
947:
946:spermatogonia
942:
935:
930:
926:
924:
920:
919:genital ridge
908:
904:
902:
898:
894:
890:
889:XXYY syndrome
886:
882:
878:
874:
870:
867:, called the
866:
862:
858:
848:
843:
834:
820:
818:
814:
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549:
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538:
535:
531:
530:fertilization
523:
517:
513:
509:
506:
503:, showing 22
502:
497:
488:
486:
482:
468:
467:pre-ejaculate
464:
461:
458:
455:
452:
448:
445:
444:
443:
439:
429:
427:
423:
417:
407:
402:
392:
390:
386:
382:
379:that produce
378:
372:
358:
350:
341:
339:
335:
331:
326:
324:
323:dartos fascia
320:
314:
304:
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186:
182:
178:
175:that produce
174:
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151:
147:
135:
129:
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119:
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110:
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83:
81:
77:
74:
71:
69:
65:
60:
55:
48:
43:
38:
33:
19:
3338:Lacuna magna
3316:Intermediate
3264:Vein of bulb
3259:Dorsal veins
2950:Epididymides
2938:Retia testes
2912:Spermatozoon
2892:Spermatocyte
2854:Leydig cells
2779:
2635:
2560:
2528:
2501:
2253:
2236:
2219:
2179:
1906:
1886:
1874:. Retrieved
1850:
1829:
1821:
1811:
1801:Bibliography
1788:, retrieved
1776:
1766:
1752:(1): 17–28.
1749:
1745:
1739:
1714:
1710:
1704:
1679:
1675:
1669:
1657:
1632:
1628:
1622:
1603:
1597:
1578:
1537:
1533:
1523:
1515:the original
1511:hu-berlin.de
1510:
1501:
1493:the original
1488:
1452:
1410:
1403:
1391:
1364:
1355:
1346:
1335:. Retrieved
1331:
1322:
1288:. Retrieved
1278:
1266:
1238:. Retrieved
1228:
1219:
1210:
1177:
1144:
1140:
1134:
1101:
1097:
963:
959:
956:Testosterone
943:
939:
915:
885:XYY syndrome
853:
810:
805:sweat glands
731:, including
722:
718:
703:
686:
682:
668:
664:
660:gubernaculum
653:
630:
622:
610:
580:
571:
552:X chromosome
527:
477:
441:
419:
416:Vas deferens
406:epididymis.
404:
395:Epididymides
389:Leydig cells
374:
327:
316:
278:
245:with a long
240:
209:
162:
145:
143:
97:A09.0.00.002
72:
3204:Superficial
2970:Stereocilia
2839:Mediastinum
2728:Parathyroid
2428:Nasopharynx
2290:Spinal cord
2225:Bone marrow
1994:Collar bone
752:facial hair
656:rete testis
474:Development
422:spermatozoa
237:Human penis
62:Identifiers
3499:Categories
2507:Oropharynx
2247:Lymph node
2180:peripheral
2026:Metatarsus
2021:Metacarpus
2000:Thigh bone
1996:(clavicle)
1897:0911910875
1876:2015-02-23
1861:0064539148
1840:0697056759
1790:2024-04-18
1777:StatPearls
1337:2024-04-17
1290:2015-03-03
1240:2015-03-03
1080:References
1030:Front view
873:aneuploidy
789:Increased
768:Increased
750:Growth of
745:pubic hair
741:chest hair
727:Growth of
626:homologous
556:chromosome
505:homologous
401:Epididymis
150:sex organs
3422:Arteries
3391:Cremaster
3311:Prostatic
3230:Arteries
2902:Spermatid
2806:Testicles
2713:Pituitary
2562:accessory
2517:Esophagus
2237:secondary
2149:Diaphragm
2093:Cartilage
2041:Phalanges
975:utriculus
901:49, XXXXX
798:shoulders
784:structure
737:abdominal
729:body hair
532:when the
522:Karyotype
508:autosomal
501:karyotype
365:Testicles
297:cartilage
287:when the
263:ejaculate
189:fertilize
173:testicles
3408:Ligament
3182:Frenulum
3177:Foreskin
3101:External
3050:Prostate
2999:Ampullae
2955:Appendix
2834:Appendix
2788:Internal
2693:Placenta
2656:Testicle
2651:Prostate
2578:Pancreas
2539:Appendix
2529:lower GI
2502:upper GI
2450:Bronchus
2393:Lymphoid
2076:Vertebra
2031:Ossicles
2016:Mandible
1785:32491659
1758:19403051
1649:13642858
1587:Archived
1169:58026884
1161:30659401
1118:29453757
1048:See also
934:mesoderm
897:48, XXXX
775:Heavier
733:underarm
371:Testicle
255:foreskin
253:and its
167:and the
3489:Anatomy
3437:Nerves
3372:Layers
3365:Scrotum
3291:Urethra
3275:Nerves
3080:Utricle
2844:Lobules
2813:Layers
2733:Adrenal
2723:Thyroid
2641:Scrotum
2618:Urethra
2613:Bladder
2522:Stomach
2445:Trachea
2381:Myeloid
2220:primary
2086:Sternum
2036:Patella
2011:Humerus
2002:(femur)
1731:1379488
1696:4715291
1570:4364032
1562:1695712
1542:Bibcode
1126:3761720
993:Gallery
985:by the
770:stature
715:Puberty
709:Puberty
692:Summary
558:of the
539:of the
534:genetic
451:bladder
332:. (The
313:Scrotum
307:Scrotum
283:during
259:urethra
169:scrotum
85:D005837
57:Details
3475:Portal
3418:Septum
3321:Spongy
3255:Veins
3221:Septum
3199:Fascia
3187:Corona
2718:Pineal
2678:Vagina
2673:Uterus
2668:Female
2608:Ureter
2603:Kidney
2549:Rectum
2485:Tongue
2433:Larynx
2352:Breast
2324:Tissue
2242:Spleen
2230:Thymus
2185:Artery
2144:Tendon
2139:Muscle
2103:Joints
2081:Pelvis
2056:Tarsus
2046:Radius
2006:Fibula
1989:Carpus
1959:organs
1913:
1894:
1858:
1837:
1822:(1918)
1783:
1756:
1729:
1694:
1647:
1629:Lancet
1610:
1568:
1560:
1534:Nature
1464:
1422:
1167:
1159:
1124:
1116:
899:, and
791:muscle
759:larynx
670:cause
648:, and
636:Testes
564:female
562:and a
541:zygote
499:Human
377:gonads
274:meatus
205:infant
197:zygote
158:pelvis
3413:Raphe
3226:Raphe
3172:Glans
3123:Crura
3110:Penis
3075:Ducts
3070:Sinus
2921:Other
2849:Septa
2688:Ovary
2683:Vulva
2646:Penis
2568:Liver
2544:Colon
2495:Tooth
2475:Mouth
2440:Lower
2418:Upper
2295:Nerve
2285:Brain
2202:Heart
2061:Tibia
2051:Skull
1566:S2CID
1165:S2CID
1122:S2CID
777:skull
763:voice
567:child
545:sperm
381:sperm
281:erect
270:urine
266:semen
251:glans
247:shaft
231:Penis
201:fetus
181:sperm
177:semen
165:penis
132:[
121:45664
68:Latin
3376:Skin
3209:Deep
3145:Body
3128:Bulb
3118:Root
2636:Male
2554:Anus
2455:Lung
2423:Nose
2371:and
2342:Skin
2190:Vein
2066:Ulna
1984:Bone
1957:and
1911:ISBN
1892:ISBN
1856:ISBN
1835:ISBN
1781:PMID
1754:PMID
1727:PMID
1692:PMID
1645:PMID
1608:ISBN
1584:Link
1558:PMID
1462:ISBN
1420:ISBN
1157:PMID
1114:PMID
932:The
887:and
859:and
815:and
781:bone
779:and
743:and
560:ovum
548:cell
291:and
193:ovum
179:and
144:The
109:3574
92:TA98
80:MeSH
2490:Lip
2312:Eye
2307:Ear
2071:Rib
1719:doi
1715:100
1684:doi
1637:doi
1550:doi
1538:346
1149:doi
1106:doi
903:.
537:sex
276:.
191:an
116:FMA
104:TA2
3501::
1775:,
1750:24
1748:.
1725:.
1713:.
1690:.
1680:37
1678:.
1643:.
1631:.
1564:.
1556:.
1548:.
1536:.
1532:.
1509:.
1487:.
1476:^
1456:.
1434:^
1376:^
1354:.
1330:.
1299:^
1249:^
1218:.
1189:^
1163:.
1155:.
1145:50
1143:.
1120:.
1112:.
1102:49
1100:.
1088:^
895:,
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735:,
644:,
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428:.
303:.
214:.
207:.
187:,
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3477::
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1947:e
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1933:v
1919:.
1900:.
1879:.
1864:.
1843:.
1760:.
1733:.
1721::
1698:.
1686::
1664:.
1651:.
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1572:.
1552::
1544::
1470:.
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1358:.
1340:.
1293:.
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1222:.
1171:.
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1108::
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807:.
786:.
765:.
754:.
747:.
136:]
34:.
20:)
Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.
