and 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.
Some examples are soft bodied animals such as sea anemones and earthworms.
Hydrostatic skeletons have a role in the locomotion of echinoderms (starfish, sea urchins), cnidarians(jellyfish),annelids (earthworms), nematodes, and other invertebrates.
Sea anemones
caterpillar
leech
earthworm
jelly fish
sea cucumber.- Hydrostatic skeletons consist of fluid-filled closed chambers.
- Internal pressures generated by muscle contractions cause
i. movement as well as
ii. maintain the shape of the animals, such as the sea anemone and worms.
The sea anemone has one set of longitudinal muscles in the outer layer of the body, and a layer of circular muscles in the inner layer of the body. The anemone can elongate or contract its body by contracting one or the other set of muscles.
Extracted. TQ
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