BIOL 1111 Study Guide - Midterm Guide: Ectotherm, Omasum, Poikilotherm
1 Apr 2014
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Possess a dorsal, ventral, anterior, and posterior side. Cephalization leads to a head, a concentration of sense organs at the o anterior end. This side is the first to encounter the environment. o. Chordata, etc: the only animals that have no body symmetry are sponges (phylum porifera). This term refers to a major group within the animal kingdom in which most, but not all of its members have either a lophophore or a trochophore: lophophore: a filter-feeding apparatus consisting of hollow tentacles. The mouth is located inside the ring of tentacles, and the anus is located outside. Cilia on the tentacles generate a current of water which allows it to filter food particles: trochophore: a microscopic swimmer larva. It has two bands of cilia which help it move and gather food: include phyla: mollusca, annelida. 1. mouth mechanical pulverization, enzymatic decomposition of starch, & formation of bolus. Storage of food, enzymatic decomposition of proteins, & mixing of food into chyme.
