Mollusca b. Crustacea c. Echinodermata e. both a. and d. 49. Describe the structures and function of a water vascular system, including ring canal, radial canal, tube feet and ampula. Echinoderms have a coelom. Echinoderms have a stomach.
Echinoderms are radially symmetrical as adults.
Echinoderms are radially symmetrical as larvae. You discover an animal with bilateral symmetry, a pseudocoelom, a tubular digestive system, and a thick multilayer cuticle. Select the group to which this animal most likely belongs.