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Unformatted text preview: Phylum Cnidarians = jellyfish ; two distinct tissue layers, no organs; capture prey using tentacles with nematocysts; 2 basic body plans = polyps and medusae ; internal extracellular digestion in gut ii. Triploblasts a. Radial Symmetry Phylum Ctenophora = comb jellies b. Bilateral Symmetry/ Protostomes Phylum Platyhelminthes = flatworms ; incomplete gut or none at all; no circulatory system; central nervous system with cerebral ganglion; most are hermaphrodites B. Pseudocoelomates/Protostomes (primitive body cavity between mesoderm and endoderm) – All are triploblasts with bilateral symmetry Phylum Nematoda – Ecdysozoans, true muscles; lack specialized respiratory systems; well-developed digestive system; separate sexes...
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This note was uploaded on 09/18/2011 for the course BIO 142 taught by Professor Jarrell during the Spring '11 term at Delgado CC.
- Spring '11