Ch 4: Classification in the Animal Kingdom

About This Chapter

This overview of classification in the animal kingdom will boost your understanding of topics like animal body plans, platyhelminthes, and chordates. These mobile-friendly lessons will assist you with getting prepared to take an exam or engage in a class discussion.

Classification in the Animal Kingdom - Chapter Summary

In this chapter on classification in the animal kingdom, helpful lessons cover subjects like the arthropod circulatory system and reproductive system. You will also look at examples of phylum Mollusca and phylum Echinodermata. After completing the chapter, you should be able to do the following:

  • List characteristics that animals possess
  • Explain the use of body plans to classify animals on earth
  • Define radiata and platyhelminthes
  • Provide examples of phylum Nematoda and phylum Annelida
  • Recall common types of arthropods
  • Discuss features of the arthropod nervous system
  • Describe the anatomy of the arthropod digestive system
  • Explain how vertebrates and invertebrates are related

Our instructors are skilled at helping you understand the concepts presented on classification in the animal kingdom. A short quiz is available to test your knowledge after each lesson, and the quizzes can be printed. Additionally, the quizzes link back to specific topics in the video, which facilitates a quick review when needed.

15 Lessons in Chapter 4: Classification in the Animal Kingdom
Test your knowledge with a 30-question chapter practice test
Animalia Kingdom: Definition, Characteristics & Facts

1. Animalia Kingdom: Definition, Characteristics & Facts

With over one million different species, the Animalia Kingdom is considered the largest kingdom. Its organisms also inhabit the most diverse habitats on Earth. This lesson will examine what characteristics animals possess and then will list some awesome animal facts.

Animal Body Plans: Classifications and Features

2. Animal Body Plans: Classifications and Features

The Animal Kingdom is diverse and complex. How do we make sense of it all? Scientists use body plans to classify and organize the animals of Earth, making it much easier to differentiate between them.

Porifera: Body Plan, Symmetry & Skeleton

3. Porifera: Body Plan, Symmetry & Skeleton

In this lesson we'll explore the varied types of body plans that porifera utilize and take a look at some of their more universal features, such as their body symmetry and their 'skeletal' support structure.

Radiata: Definition and Characteristics

4. Radiata: Definition and Characteristics

The super-phylum Radiata describes a unique and interesting group of animals. In this video lesson you'll identify various animals that belong in this classification as well as describe the characteristics that make them so identifiable.

Platyhelminthes: Definition, Characteristics & Examples

5. Platyhelminthes: Definition, Characteristics & Examples

What is Platyhelminthes? In this lesson, you will learn about this phylum as well as some interesting interesting characteristics of Platyhelminthes organisms. You can read about some example organisms before taking a brief quiz.

Phylum Nematoda: Classes, Characteristics & Examples

6. Phylum Nematoda: Classes, Characteristics & Examples

With 25,000 species discovered and an estimated 900,000 waiting to be discovered, phylum Nematoda is one the most species-rich phyla in the animal kingdom. This lesson discusses this and many other interesting facts about these tiny worms.

Phylum Annelida: Characteristics, Classes & Examples

7. Phylum Annelida: Characteristics, Classes & Examples

Phylum Annelida contains a variety of worms and their relatives. They are found everywhere from marine and freshwater habitats to damp soil. Learn more about annelids here and take a short quiz.

Phylum Mollusca: Digestive, Nervous & Circulatory Systems

8. Phylum Mollusca: Digestive, Nervous & Circulatory Systems

Learn about the animal phylum Mollusca and its most important body systems. Mollusca includes a wide range of common invertebrate species that can inhabit land, freshwater, and saltwater environments, making them an extremely diverse group of organisms.

Phylum Echinodermata: Definition, Characteristics & Examples

9. Phylum Echinodermata: Definition, Characteristics & Examples

Learn about echinoderms, which include starfish and sand dollars, in this lesson. We'll discuss what an echinoderm is, examine what their defining features are, and go over some examples of the five classes that make up the phylum Echinodermata.

Arthropods: Definition, Characteristics & Types

10. Arthropods: Definition, Characteristics & Types

Arthropods are the most abundant animals on the planet. They fly, jump, swim, and crawl over just about every inch of the world. Learn about common types of arthropods and the characteristics they have in common.

Phylum Arthropoda Nervous System

11. Phylum Arthropoda Nervous System

How does an arthropod sense the world around it? How do these animals react to external stimuli? In this lesson, we'll discuss the structure and function of the arthropod nervous system, and compare a few special examples of arthropod nervous system adaptations.

Phylum Arthropoda Circulatory System

12. Phylum Arthropoda Circulatory System

Arthropods have a number of features that set them apart from other animals. One of these features is their open circulatory system, with both a haemocoel and hemolymph, which we'll discuss in more detail in this lesson.

Phylum Arthropoda Digestive System

13. Phylum Arthropoda Digestive System

A wide variety of species in the animal kingdom belong to the group called Arthropoda; commonly called arthropods. In this lesson, we will be looking at the anatomy of their unique digestive system and how it functions.

Phylum Arthropoda Reproduction System

14. Phylum Arthropoda Reproduction System

Although most arthropods reproduce through direct sexual reproduction and lay eggs, there is much more diversity beyond that. We will look at several reproductive features and methods, and review some examples of species that use each type.

Chordates: Features, Groups & Characteristics

15. Chordates: Features, Groups & Characteristics

Chordata is a group of related vertebrates and invertebrates. How can vertebrates and invertebrates be related? They appear to be very different. Read on to find out.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
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Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
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