Biology Chapter 27 Notes Worms and Mollusks

Chapter 27 Worms and Mollusks Notes Phylum Platyhelminthes (FLATWORMS) Soft, flattened worms with tissues and internal organ systems Simplest animals with three embryonic germ layers Bilateral symmetry Cephalization No circulatory system, Diffusion is used for respiration, excretion, circulation Acoelomates – “without coelom” ................
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