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Chapter 17: Introduction to Animals

Difficulty Level: At Grade Created by: CK-12
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(Opening image copyright RAGMA IMAGES, 2010. Used under license from Shutterstock.com.)

Introduction to Animals


Lesson 17.1: Overview of Animals

17.1.1 Characteristics of Animals

  • Animal Cells
  • Animal Structure and Function
  • Animal Life Cycle and Reproduction

17.1.2 Classification of Animals

  • Major Animal Phyla
  • Invertebrate vs. Invertebrate

17.1.3 Major Trends in Animal Evolution

  • Animal Origins
  • Evolution of Invertebrates
  • Moving from Water to Land
  • Evolution of Chordates
  • Evolution of Vertebrates
  • Evolution of Amniotes

Lesson 17.2: Overview of Invertebrates

17.2.1 Characteristics of Invertebrates

  • Digestion
  • Movement
  • Nervous System
  • Reproduction

17.2.2 Invertebrate Evolution

  • Multicellularity
  • Tissues
  • Radial Symmetry
  • Cephalization
  • Bilateral Symmetry
  • Mesoderm
  • Complete Digestive System
  • Pseudocoelom and Coelom
  • Segmented Body
  • Notochord

17.2.3 Classification of Invertebrates

  • Major Invertebrate Phyla
  • Protostomes and Deuterostomes

Pacing the Lessons

Use the Class Periods per Lesson table below as a guide for the time required to teach the lessons of this chapter.

Lesson Number of Class Periods
17.1 Overview of Animals 2.0
17.2 Overview of Invertebrates 2.0
  • Class periods are assumed to be 60 minutes long.

Online Resources

See the following Web sites for appropriate laboratory activities:

1. This is a simple lab in which students will use microscopes to observe plant and animal cells and identify their differences.

2. In this lab, students will make and use a taxonomic key to learn distinguishing characteristics of common invertebrate and vertebrate animals.

These Web sites may also be helpful:

1. At the URL below, you can find a wealth of information, images, and other materials documenting the diversity of the animal kingdom.

Chapter Outline

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