Hydrostatic skeleton
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A hydrostatic skeleton or hydroskeleton is a structure found in many [[Cold-blooded organisms soft-bodied animals]] consisting of a fluid-filled cavity, the coelom, surrounded by muscles. The pressure of the fluid and action of the surrounding muscles are used to change an organism's shape and produce movement, such as burrowing or swimming. Hydrostatic skeletons have a role in the locomotion of echinoderms (starfish, sea urchins), cnidarians (jellyfish), annelids (earthworms), nematodes, and other invertebrates. They have some similarities to muscular hydrostats.
See also
External links
- http://www.cco.caltech.edu/~brokawc/Bi11/AnimalPhylogeny2.html
- http://bama.ua.edu/~clydeard/bsc376/lecture9.htm
- http://soma.npa.uiuc.edu/courses/physl490b/models/leech_swimming/leech_swim.html
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