What Distinguishes a Coelomate Animal from a Pseudocoelomate Animal Is

Question

What distinguishes a coelomate animal from a pseudocoelomate animal is that coelomates
A)have a body cavity, whereas pseudocoelomates have a solid body.
B)contain tissues derived from mesoderm, whereas pseudocoelomates have no such tissue.
C)have a body cavity completely lined by mesodermal tissue, whereas pseudocoelomates do not.
D)have a complete digestive system with mouth and anus, whereas pseudocoelomates have a digestive tract with only one opening.
E)have a gut that lacks suspension within the body cavity, whereas pseudocoelomates have mesenteries that hold the digestive system in place.

Accepted Answer

Coelomates have a true body cavity, known as a coelom, that is completely lined with mesodermal tissue. In contrast, pseudocoelomates have a body cavity that is only partially lined with mesodermal tissue, often containing both mesodermal and endodermal tissues. Therefore, the key distinguishing factor between coelomates and pseudocoelomates is the presence of a completely mesodermally-lined body cavity in coelomates.