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Ch 39: Praxis General Science: Human Body Systems

About This Chapter

Prior to taking the Praxis General Science examination, brush up on human body systems. This chapter includes several text and video lessons that emphasize the topic. Make sure you're absorbing the information by completing the short quizzes.

Praxis General Science: Human Body Systems - Chapter Summary

Become more knowledgeable about human body systems when you take a look at the text and video lessons within this chapter. With a focus on the human digestive, circulatory, skeletal and muscular systems, the lessons can prepare you for some questions you'll find on the Praxis General Science examination. Explore the parts of the brain and the anatomy of neurons, and review the process through which the blood receives oxygen. You can also study the body's immune systems. As you near the end of the chapter, you could be ready to:

  • Explain the makeup of multicellular organisms
  • Describe different kinds of connective tissue
  • Discuss how the skeletal and muscular systems support our bodies and allow for movement
  • Explore the use of animal body plans
  • List the parts and functions of the circulatory, digestive, excretory and nervous systems
  • Illustrate the structure of neurons, the brain and the cerebral cortex
  • Teach students about homeostasis, innate immunity and acquired immunity
  • Discuss the characteristics of pathogens and viruses

Seasoned professionals will present you with these and other topics through the online text and video lessons in this chapter. With the help of your mobile device, you'll be able to fit this flexible program into your everyday routine as you prepare for the Praxis General Science examination's questions on human body systems. In addition to the viewable lessons, you'll find transcripts and five-question quizzes. Your quiz results can be printed out along with the corresponding worksheets and reviewed several times daily.

Praxis General Science: Human Body Systems Chapter Objectives

Five content categories and 135 selected-response questions comprise the 2.5 hour Praxis General Science examination, which is administered on the computer. Apply your store of advanced knowledge of human body systems on the Life Science content category of the assessment. Some of the test will require your correct answers on questions regarding homeostasis, the immune, skeletal and muscular systems, autoimmune disorders and more. The category has about 27 questions and it makes up approximately 20% of the score.

16 Lessons in Chapter 39: Praxis General Science: Human Body 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.

Types of Connective Tissue

2. 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

3. 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.

Animal Body Plans: Classifications and Features

4. 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.

The Human Circulatory System: Parts and Functions

5. The Human Circulatory System: Parts and Functions

In this lesson, you will take a ride on the transportation system of the body called the circulatory system and its two parts: the pulmonary circuit and the systemic circuit. Take a look inside and see how every inch of your body receives the oxygen and nutrients it needs.

Gas Exchange in the Human Respiratory System

6. 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.

Overview of the Human Digestive System

7. Overview of the Human Digestive System

Discover how the human digestive system works - one of the most important systems in the human body. Learn what each part does, and then see how much you remember with a quick quiz.

Excretory System

8. 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.

The Human Nervous System: Parts & Functions

9. The Human Nervous System: Parts & Functions

Your nervous system allows you to experience the world around you and react to it. It's a complex system that's split into two main parts, the central nervous system and the peripheral nervous system. Read on to learn the parts and functions of the system.

The Structure and Function of Neurons

10. The Structure and Function of Neurons

In this video lesson, you'll learn about neurons, which are specialized cells in the nervous system. Check out how far neurons can send signals throughout the body and how depolarization is much like 'the wave' at a football game.

Homeostasis in the Human Body

11. Homeostasis in the Human Body

Homeostasis is the term we use to describe the reasonably stable internal environment of your body. Learn how parts of your body communicate with each other to maintain this state of homeostasis, and how negative feedback loops work.

Brain Structures and Functions Part I

12. Brain Structures and Functions Part I

The brain's complexity can often be difficult to understand because it serves so many important functions. In this lesson, you'll get a little help from Nrr, the alien biologist, who will guide you through understanding the structure and functions of the human brain.

The Cerebral Cortex: Brain Structures and Functions Part II

13. The Cerebral Cortex: Brain Structures and Functions Part II

Check out this video lesson to learn about the four lobes of the human brain - the frontal, parietal, occipital and temporal. You'll learn about the functions and processes of each region.

Innate Immunity: Inflammation, Neutrophils & Natural Killer Cells

14. Innate Immunity: Inflammation, Neutrophils & Natural Killer Cells

You might already know how your body handles known infectious agents but how about unknown? Watch this video to explore your innate immune system - your body's defense against new bacteria and viruses.

Acquired Immunity: T Cells, B Cells and Antibodies

15. Acquired Immunity: T Cells, B Cells and Antibodies

Have you ever wondered why some people don't ever seem to get sick? These people likely have an acquired immunity. Learn more about the immune system and how exposure to an illness one time can help your body to prevent that illness from ever occurring again.

Pathogens, Viruses, Antibiotics & Vaccines

16. Pathogens, Viruses, Antibiotics & Vaccines

Pathogens, including viruses, are the cause of much of the sickness in the world today. Luckily, in the last few decades we have developed a range of tools to use against them, especially antibiotics and vaccines.

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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