Coelom

Science / Biology / Coelom: In animals, a body cavity between the body wall and the digestive system that forms during preadult development.

Acoelomates

Science / Biology / Acoelomates: Animals that do not have a coelom or body cavity; e.g., sponges and flatworms. MORE

Coelomates

Science / Biology / Coelomates: Animals that have a coelom or body cavity lined with mesoderm. MORE

Pseudocoelomates

Science / Biology / Pseudocoelomates: Animals that have a body cavity that is in direct contact with the outer muscular layer of the body and does not arise by splitting of the mesoderm; e.g., roundworms. MORE

Pseudocoelom

Science / Biology / Pseudocoelom: In nematodes, a closed fiuid-containing cavity that acts as a hydrostatic skeleton to maintain body shape, circulate nutrients, and hold the major body organs. MORE

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