the body cavity between the digestive system and the body wall is completely lined by tissue derived from mesoderm.
No, mollusks have a true coelom instead of a pseudocoelom. The coelom is a part of mollusks and annelids that is a cavity within the mesoderm that is filled with fluid.
Coelomates are either deutermostomes or protostomes. A protostomes have spiral cleavage lie mollusks, annelids, and arthropods. A deutermostomes has radial cleavage such as echinoderms, and chordates.
Coelomates.
coelomates
Most animals are coelomates, including humans.
stomach -footed mollusks
Head-footed mollusks
Mollusks compose of the large phylum of invertebrate animals known as the Mollusca. Mollusks have a mantle, mollusks invertebrate. Arthropods have jointed appendages, arthropods have segmented bodies
No, arthropods are coelomates
Yes, earthworms are coelomates because they have the "tube within a tube" body plan that characterises coelomates. More specifically, coelomates have a body cavity that is completely lined with cells derrived from the mesoderm (the germ layer of tissue found between the endoderm and ectoderm in embryonic development).
There are over 50,000 known species of Mollusks! That figure makes them second only to the Arthropods in invertebrate phylum size.
Animals that have lined abdominal cavities are known as coelomates. The coelom, or body cavity, is used for protecting their internal organs.