Ch 27: Praxis Biology & General Science: Circulatory, Digestive & Excretory Systems

About This Chapter

Let us teach you about anatomy and physiology. The video lessons and self-assessment quizzes in this chapter can help you correctly answer questions about diversity of life, plants and animals on the Praxis II: Biology and General Science test.

Anatomy and Physiology I - Chapter Summary

Explore several systems of the body, including the circulatory and digestive systems, in this series of brief video lessons. This is the first of two anatomy and physiology chapters designed to help you prepare for the Praxis II: Biology and General Science test. Our experienced, professional educators will introduce you to multicellular organisms, tissues and epithelium and teach you about chemical digestion of carbohydrates. Other topics covered in this chapter include the following:

  • Types of connective tissue
  • The skeletal and muscular systems
  • Types of circulatory systems
  • The human vascular system
  • The heart
  • Red blood cells and hemoglobin
  • Gas exchange in the human respiratory system
  • The upper and lower gastrointestinal tracts
  • The excretory system

Anatomy and Physiology I Objectives

Questions about diversity of life, plants and animals make up around 17% of the Praxis II: Biology and General Science test. This content category is likely to include questions about anatomy and physiology. The biology and general science Praxis test, which is used by most states as part of their secondary school teacher certification process, consists of 120 multiple-choice questions, which must be completed within a 2-hour time frame.

In addition to the video lessons, this chapter includes transcripts and short self-assessment quizzes that can help you prepare for the Praxis II. The videos typically can be watched in less than 10 minutes, and they include video tabs that allow you to quickly return to main points if need be.

13 Lessons in Chapter 27: Praxis Biology & General Science: Circulatory, Digestive & Excretory Systems
Test your knowledge with a 30-question chapter practice test
Chemical Digestion of Carbohydrates: Definition & Process

1. Chemical Digestion of Carbohydrates: Definition & Process

Carbohydrates are an important energy source, but must be broken down to be absorbed out of the digestive tract. In this lesson, you will learn how disaccharides and polysaccharides are broken down to monosaccharides through a process called hydrolysis.

Multicellular Organisms, Tissues and Epithelium

2. 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.

Types of Connective Tissue

3. Types of Connective Tissue

In this lesson, you'll learn about the various types of connective tissues in the body. These tissues include bone, fat, cartilage and blood. They form the framework of the body, support organs and much, much more!

Skeletal System and Muscular System

4. Skeletal System and Muscular System

Do you know how many bones are in the human body? Check out this video lesson to uncover the answer, as well as understand the role and importance of the skeletal and muscular systems.

Circulatory System I: Types of Circulatory Systems

5. 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

6. 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 III: The Heart

7. Circulatory System III: The Heart

What purpose does the heart serve? And how do different types of hearts function? In this lesson, you'll learn about two, three and four-chambered hearts.

Circulatory System IV: Red Blood Cells

8. Circulatory System IV: Red Blood Cells

Why don't mature red blood cells have nuclei or mitochondria, and how do these guys squeeze through capillaries? While learning about the brief but glorious lives of red blood cells, you'll also see which characteristics help them transport oxygen and carbon dioxide to other cells.

Circulatory System V: Hemoglobin

9. 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

10. 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.

Digestive System I: The Upper Gastrointestinal Tract

11. Digestive System I: The Upper Gastrointestinal Tract

Did you know that there are digestive enzymes in your saliva? It's true. As soon as you put a piece of food in your mouth, the digestive process begins. Join us with this first of two lessons about the human digestive system, where we'll follow food through the upper gastrointestinal tract from the mouth through the stomach.

Digestive System II: The Lower Gastrointestinal Tract

12. Digestive System II: The Lower Gastrointestinal Tract

The lower gastrointestinal tract is the part of the digestive system that is responsible for the last part of food digestion and the expulsion of waste from the body. In this lesson, we'll look at each part of the system and what functions each serves in the process of digestion.

Excretory System

13. 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.
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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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Other Chapters

Other chapters within the Praxis Biology and General Science: Practice and Study Guide course

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