| Term | Definition |
|---|
| radial cleavage; archenteron fold forms the anus; coelom develops from outpouching of archenteron wall | deuterostomes |
| spiral cleavage; archenteron fold forms the mouth; coelom develops from a splitting of the mesordermal tissue on each side of the archenteron | protostomes |
| sponges; parazoa; no symmetry; amoebocytes carry out digestion | porifera |
| jellyfish, corals; eumetazoa; 2 germ layers; radial symmetry; 1 gut opening | cnidaria |
| flatworms; eumetazoa; 3 germ layers; bilateral symmetry;1 gut opening; acoelomate | platyhelminthes |
| roundworms; eumetazoa; 3 germ layers; bilateral body symmetry; 2 gut openings; pesudocoelomate | nematoda |
| rotifers; eumetazoa; 3 germ layers; bilateral symmetry; 2 gut openings pesudo-coelomate | rotifera |
| clams, snails, octopuses; eumatozoa; 3 germ layers; bilateral symmetry; 2 gut openings; coelomate; protostome | mollusca |
| segmented worms; eumatozoa; 3 germ layers; bilateral symmetry; 2 gut openings; coelomate; protostome | annelida |
| sea stars, sea urchins; eumetazoa, 3 germ layers; radial symmetry; 2 gut openings; coelomate; deuterostome | echinodermata |
| insects, spiders, crustaceans; eumetazoa, 3 germ layers; bilateral symmetry; 2 gut openings; coelomate; protosome | arthropoda |
| vertebrates; eumetazoa; 3 germ layers; bilateral symmetry; 2 gut openings; coelomate; deuterostome | chordata |
| term for animals that lack a coelom | acoelomate |
| term for animals with a cavity not completely lined by mesoderm-derived tissue | psuedocoelomate |
| term for animals with a cavity developed from tissue derived from the mesoderm germ layer | coelomate |
Combine with other sets
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