a coelomate animal has a body cavity that is completely lined by mesothelium in some animals like molluscs.
a coelomate animal has a body cavity that is completely lined by mesothelium in some animals like molluscs.
a coelomate animal has a body cavity that is completely lined by what kind of tissue in some animals like molluscs?
mesothelium
coelom









































the coelom is the main body cavity in most animals and is positioned inside the body to surround and contain the digestive tract and other organs. in some animals, it is lined with mesothelium. in other animals, such as molluscs, it remains undifferentiated.









































section::::etymology.









































the term "coelom" derives from the ancient greek word (), meaning "cavity".









































section::::structure.









































section::::structure.:development.









































coelom is the mesodermally lined cavity between the outer body wall and gut.
coelom
pseudocoelomate animals have a pseudocoelom (literally “false cavity”), which is a fluid filled body cavity. tissue derived from mesoderm partly lines the fluid filled body cavity of these animals. thus, although organs are held in place loosely, they are not as well organized as in a coelomate. all pseudocoelomates are protostomes; however, not all protostomes are pseudocoelomates. an example of a pseudocoelomate is the roundworm. pseudocoelomate animals are also referred to as blastocoelomate.









































acoelomate animals, like flatworms, have no body cavity at all. semi-solid mesodermal tissues between the gut and body wall hold their organs in place.









































section::::coelomates.
coelom