Unformatted text preview: and the mesoderm and coelom form from outgrowths of the primitive gut. Echinodermata- a phylum of radially symmetrical coelomate marine animals consisting of the starfishes, sea urchins, and related forms. Radial Symmetry-Symmetrical arrangement of parts of an organism around a single main axis, so that the organism can be divided into similar halves by any plane that contains the main axis. The body plans of echinoderms, ctenophores, cnidarians, and many sponges and sea anemones show radial symmetry. Urochordata- A subphylum of chordates intermediate between the invertebrates and the true vertebrates . Water Vascular System- Functions in locomotion of echinoderm’s internal hydraulic system associated with the functioning of the tube feet....
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- Spring '07
- Evolution, Cephalochordata, bilaterally symmetric animals, Natalie Eng Deuterstomes, Radial Symmetry- Symmetrical