Unformatted text preview: respiratory systems, and most have only a minimal circulatory system. o Given their radial symmetry, there is no head or central brain; the nervous system is organized around nerve cords that encircle the mouth and branch into the rays. o Produce by releasing gametes into the water. o Produce asexually too: splitting in half and regenerating the missing parts o...
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This note was uploaded on 03/31/2009 for the course LIFESCI Life scien taught by Professor Lorenz,t.c. during the Spring '09 term at UCLA.
- Spring '09