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Ch 33: Campbell Biology Chapter 33: An Introduction to Invertebrates

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About This Chapter

The Introduction to Invertebrates chapter of this Campbell Biology Companion Course helps students learn the essential lessons associated with invertebrates. Each of these simple and fun video lessons is about five minutes long and is sequenced to align with the Introduction to Invertebrates textbook chapter.

How It Works:

  • Identify the lessons in the Campbell Biology Introduction to Invertebrates chapter with which you need help.
  • Find the corresponding video lessons with this companion course chapter.
  • Watch fun videos that cover the invertebrates topics you need to learn or review.
  • Complete the quizzes to test your understanding.
  • If you need additional help, rewatch the videos until you've mastered the material or submit a question for one of our instructors.

Students will learn:

  • Traits of Parazoans
  • Types of Cnidarians
  • Kinds of flatworms and roundworms
  • Types of mollusks
  • Traits of annelids
  • Behaviors and characteristics of insects
  • Characteristics of echinoderms

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7 Lessons in Chapter 33: Campbell Biology Chapter 33: An Introduction to Invertebrates
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Parazoa: Definition and Characteristics

1. Parazoa: Definition and Characteristics

Parazoans are sponges of various sizes, shapes, and colors that lack specialized tissue and are classified as animals. Learn about the definition, characteristics, and overall composition of parazoa.
Cnidarians: Types & Examples

2. Cnidarians: Types & Examples

Cnidarians are a group of invertebrate animals like jellyfish, corals, and sea anemones. Discover Cnidarian's body structure, Cnidarians types, examples of Cnidarians like anthozoa, hydrozoa, scyphozoa, and cubozoa.
Flatworms: Types & Structure

3. Flatworms: Types & Structure

Flatworms are mostly parasitic organisms that cause harm to their hosts through sickness and disease. Explore the types, body structure, and systems of flatworms, and learn about Phylum Platyhelminthes, flukes, tapeworms, and planarians.
What are Roundworms? - Types, Examples & Characteristics

4. What are Roundworms? - Types, Examples & Characteristics

A roundworm, also known as a nematode, is a very small worm that lives in the intestines of people, pigs, and other animals. Discover the physical characteristics and taxonomic classification of roundworms as well as examples of roundworms that infect humans and how these infections are treated.
Mollusks: Characteristics & Types

5. Mollusks: Characteristics & Types

Mollusks are invertebrates that have soft and flexible bodies and are usually encased in shells. Discover the definition and characteristics of mollusks, and explore the three main types: gastropods, bivalves, and cephalopods.
Annelids: Types & Structure

6. Annelids: Types & Structure

Annelids are worms with segmented bodies. Annelids are divided into three main classes. A brief description and example of each class will be provided in this lesson.
Echinoderms: Traits, Types & Roles

7. Echinoderms: Traits, Types & Roles

Echinoderms are marine invertebrates that have spiny skin and usually have a star, spherical, or elongated shape. Learn about the definition and examples of echinoderms, and explore their traits, types, and roles.
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