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Ch 21: AP Biology: The Circulatory, Respiratory, and Excretory Systems

About This Chapter

Learn about the circulatory, respiratory, and excretory systems of the human body. Then test your knowledge with a short quiz to prepare for the AP Biology exam.

AP Biology: The Circulatory, Respiratory, and Excretory Systems - Chapter Summary

The video lessons in this chapter provide an overview of the components and functions of major systems in the human body: circulatory, respiratory, and excretory. Each short video lesson brings the body system to life, with engaging animations and concrete explanations. After watching each lesson, take the multiple choice quiz to check your mastery. When you have completed this chapter, you should be prepared to answer AP Biology exam questions in these areas:

  • Identifying tissues and epithelium
  • Examining the types of circulatory systems in different organisms
  • Summarizing the human vascular system and the role of hemoglobin
  • Explaining how gas exchange works in the respiratory system
  • Detailing the excretory system

6 Lessons in Chapter 21: AP Biology: The Circulatory, Respiratory, and Excretory Systems
Test your knowledge with a 30-question chapter practice test
Multicellular Organisms, Tissues and Epithelium

1. Multicellular Organisms, Tissues and Epithelium

In this lesson on multicellular organisms, you'll take a look at what it actually means to be multicellular and how cells are organized into tissues, organs, and organ systems. This lesson also covers one of the four main tissue types: epithelial tissue.

Circulatory System I: Types of Circulatory Systems

2. Circulatory System I: Types of Circulatory Systems

From cnidarians to humans, all animals need a circulatory system to absorb nutrients and get rid of waste. Find out why different kinds of animals have different systems, and see what a closed circulatory system and indoor plumbing have in common.

Circulatory System II: The Human Vascular System

3. Circulatory System II: The Human Vascular System

In this lesson, learn all about the operation of the human vascular system. What are the different types of blood vessels? How does blood flow through the human body? How does the system adapt to your body changing?

Circulatory System V: Hemoglobin

4. Circulatory System V: Hemoglobin

Did you ever wonder how red blood cells can store enough oxygen to supply the entire human body? Join us in this lesson on hemoglobin to learn why red blood cells are so good at transporting oxygen and carbon dioxide. This lesson will make you see red (as well as blue and purple-maroon)!

Gas Exchange in the Human Respiratory System

5. Gas Exchange in the Human Respiratory System

Did you know that the average human lung has a respiratory surface area that is roughly the same size as half of a tennis court? Believe it or not, that's how much surface area an active, healthy human needs to ensure that the body gets plenty of oxygen.

Excretory System

6. Excretory System

Each year in the U.S., close to 400,000 people with kidney failure undergo dialysis treatment in order to remove waste, remove excess fluid and restore electrolyte balance. Kidneys, the workhorses of the excretory system, perform these same functions more effectively than any machine. In this lesson, we'll talk about how the excretory system removes toxic substances from the body.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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