Answer to Question #177991 in Evolution for Tobias Amukwiita

Question

How does the body plan of cnidarian differ from that of sponge?

Answer 1

These organisms have a simple organization. Sponges have multiple cell types that are geared toward executing various metabolic functions. Cnidarians have outer and inner tissue layers sandwiching a non-cellular mesoglea. Cnidarians possess a well-formed digestive system and carry out extracellular digestion.