ZOO 2700 Study Guide - Final Guide: Bivalve Shell, Banana Slug, Radula

• School: University of Guelph
• Department: Zoology
• Course: ZOO 2700
• Professor: Alex Smith

Document Summary

Zoo lab 4 notes (green= class, grey= phylum, orange= sub-phylum) Traits that unite this group include: muscular foot involved in locomotion, sensory head associated with food acquisition by the unique molluscan feature of a radula. Visceral mass: houses the internal organs and is enclosed by a dorsal mantle. Dorsal mantle: chamber or mantle cavity filled with water or air, houses the ctenidium, anus, and nephridiopore(s) Ctenidium = a comblike structure, especially a respiratory organ or gill in a mollusc, consisting of an axis with a row of projecting filaments. Nephridiopore = the external opening of a nephridium (a tubule open to the exterior that acts as an organ of excretion or osmoregulation: secretes an external calcareous shell. Well-developed hemal system: consisting of the heart and vessels leading to a spacious hemocoel in which most of the viscera are located. Cns: cephalized, ganglia are concentrated in the circumenteric nerve ring which four major longitudinal nerve cords arise from.