BIO 1106 Study Guide - Midterm Guide: Insect, Centipede, Crustacean
28 Nov 2016
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Phylum mollusca 1st half of exercise 38. Characterized by a calcium-based shell, a mantle (layer of tissue that secretes the shell), a ventral muscular foot, and a visceral mass of organ systems (digestion, excretion, and reproduction) 4 classes! distinguished by type of shell (for the most part) Class polyplacophora also known as chitins, have 8 divided plates along its dorsal surface. Class gastropoda snails and slugs, some have shells (single coiled shell), ex. conch. Class bivalvia clams, oysters, scallops, mussels, have two shells ( bi-valvia ) Anodontia- freshwater mussel: dissection, be able to identify! heart, mantle, gills, foot, labial palp, hinge, umbo, hinge tooth, posterior adductor muscle, anterior adductor muscle. Class cephalopoda squid and octopi, usually no shell (except nautilus- fig. 3 subphyla! distinguished mainly by variation in appendages. Exoskeleton made of chitin (for protection and a place for muscle attachment)
