Biology: The Dynamic Science (MindTap Course List)
Biology: The Dynamic Science (MindTap Course List)
4th Edition
ISBN: 9781305389892
Author: Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher: Cengage Learning
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Chapter 31.6, Problem 3SB
Summary Introduction

To review:

The anatomical structures and physiological systems of squids and other cephalopods responsible for making them more active than other mollusks.

Introduction:

Mollusca is the second largest phylum of animal kingdom. They are soft-bodied, unsegmented animals covered with shell. Body is covered with head, a transparent skin covering body wall called mantle, and ventral foot. Mouth cavity consists of radula for rasping. Mantle secrets a calcareous external shell, which is the characteristic of this phylum. Some species may have internal shell as well. Respiration takes place through lungs or gills.

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Biology: The Dynamic Science (MindTap Course List)
Biology
ISBN:9781305389892
Author:Peter J. Russell, Paul E. Hertz, Beverly McMillan
Publisher:Cengage Learning