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Acetabulum is essentially an organ of attachment. In annelids, it is used for adherence to the substratum during a looping locomotion. Annelid worms such as leeches move by repeated alternating extensions and shortenings of the body. This in turn is done by successive attachment and detachment of the
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for detecting the surrounding. When the sucker attaches itself on an object, the infundibulum mainly provides adhesion while the central acetabulum is quite free. This provides greater suction on the flat surface; hence, making pressure incredibly low. This is why octopus grip is exceptionally firm.
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In flatworms, acetabulum is the ventral sucker situated towards the anterior part of the body, but behind the anterior oral sucker. It is composed of numerous spines for penetrating and gripping the host tissue. The location and structure of the acetabulum, and the pattern of the spine alignment are
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accessory. The best studied acetabular activity is that of octopus. Octopus arms contains 200-300 independently controlled suckers that can grasp small objects and produce high adhesion forces on virtually any non-porous surface. This precise mechanism of high flexibility even has a potential
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In leeches, acetabulum refers to the prominent posterior sucker at the extreme end of the body. In fact it forms a head-like structure, while the actual head is relatively small. It is a thick disc-shaped muscular system composed of circular, longitudinal and radial fibers.
228:. It occupies the central portion of the sucker and surrounded by a larger spherical cavity infundibulum. Both these structures are thick muscles, and the acetabulum is specifically composed of radial muscles. They are covered with
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Grasso FW, Setlur P (2007). "Inspiration, simulation and design for smart robot manipulators from the sucker actuation mechanism of cephalopods".
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Stern-Tomlinson W, Nusbaum MP, Perez LE, Kristan WB Jr (1986). "A kinematic study of crawling behavior in the leech, Hirudo medicinalis".
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Cribb TH, Bray RA (1999). "A review of the
Apocreadiidae Skrjabin, 1942 (Trematoda: Digenea) and description of Australian species".
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denoting "saucer" or "vessel" or "bowl". The name is used because of the saucer-like structure in the invertebrates.
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Skírnisson K, Kolářová L, Horák P, Ferté H, Jouet D (2012). "Morphological features of the nasal blood fluke
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753:, Mazzolai B, Mattoli V, Cianchetti M, Dario P (2009). "Design of a biomimetic robotic octopus arm".
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Farnesi RM, Marinelli M, Tei S, Vagnetti D (1981). "Morphological and ultrastructural aspects of
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Then contraction of the radial muscle of the acetabulum causes detachment of the entire sucker.
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Filippi JJ, Quilichini Y, Marchand B (2013). "Topography and ultrastructure of the tegument of
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oral sucker and the acetabulum. In flukes it is used for penetrating the mucosal wall of the
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for maintaining its parasitic habitat. It is sensory in nature consisting of type 2
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for attaching to a substratum. The name also applies to the suction
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An octopus displaying its suckers with central cavity of acetabulum
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293:"Helminths: Structure, Classification, Growth, and Development"
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449:(Schistosomatidae, Digenea) from naturally infected hosts".
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Acetabulum in molluscs is a circular hollow opening on the
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in trematodes by which the worms are able to attach on the
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540:"The structure and adhesive mechanism of octopus suckers"
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249:, which is a smooth bulb-like non-ciliated papilla.
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816:"Learn about octopuses & relatives: locomotion"
208:important diagnostic tool among trematode species.
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146:Acetabulum literally means "a small saucer for
359:"Adhesive mechanisms in cephalopods: a review"
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257:Molluscans uses it for grasping substratum,
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402:Whit. (Annelida, Oligochaeta) suckers".
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200:On the right, eyspot-like acetabulum of
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656:(Osteichthyes: Anguillidae)".
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357:von Byern J, Klepal W (2005).
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857:Definition at Dictionary.com
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814:Octopuses & Relatives.
266:mechanical applications in
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538:Kier WM, Smith AM (2002).
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150:". It is derived from two
721:10.1088/1748-3182/2/4/s06
670:10.1007/s00436-012-3162-9
463:10.1007/s00436-011-2713-9
400:Branchiobdella pentodonta
376:10.1080/08927010600967840
158:, meaning "vinegar", and
506:10.1023/a:1006197201426
447:Trichobilharzia regenti
416:10.1002/jmor.1051700206
243:gastrointestinal tract
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587:. Deep Intuition, LLC
557:10.1093/icb/42.6.1146
337:collinsdictionary.com
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331:Collins Dictionary.
297:Medical Microbiology
295:. In Baron S (ed.).
75:invertebrate zoology
767:2009BiBi....4a5006L
713:2007BiBi....2..170G
650:Deropristis inflata
270:. Each sucker is a
118:cephalopod molluscs
820:asnailsodyssey.com
619:10.1007/bf00603803
291:Castro GA (1996).
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202:Fasciola gigantica
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95:specialised sucker
887:Animal morphology
654:Anguilla anguilla
306:978-0-9631172-1-2
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363:Biofouling
343:2013-06-08
279:References
263:locomotory
130:cuttlefish
102:adaptation
93:. It is a
17:Acetabulum
771:CiteSeerX
686:253978450
585:tonmo.com
479:253976749
404:J Morphol
339:. Collins
230:chitinous
192:Trematode
170:Structure
142:Etymology
114:appendage
99:parasitic
91:flatworms
71:acetabula
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751:Laschi C
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268:robotics
261:and for
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175:Annelids
135:Nautilus
120:such as
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148:vinegar
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79:saucer
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152:Latin
122:squid
87:leech
77:is a
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162:, a
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