The external surface of an animal body that encloses the body cavity and consists of ectoderm and mesoderm.
- The hydrostatic skeleton is a fluid-filled cavity in the body wall, supported by a layer of smooth muscle, which holds the animal rigid in much the same way the air inside a balloon holds it rigid.
- Daphnia females posses a brood chamber located between the body wall and dorsal surface of the carapace used to carry their eggs.
- The forelimbs are specialized to form flippers, and the hind limbs and pelvis are extremely small and do not normally extend out of the body wall of the animal.
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Syllabification: bod·y wall
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