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Ch 1: Overview of the Human Body

About This Chapter

This chapter broadly covers the main parts and functions of the human body. View info presented in video lessons on the heart, nervous system, skeletal system, skin and other body components.

Overview of the Human Body - Chapter Summary

Study various heart conditions, such as atherosclerosis, coronary heart disease and congestive heart failure. Find out about the cardiac cycle along with the terms diastole and systole. Heartbeat, blood flow, heart valves and the four chambers of the heart are also covered in the chapter.

The chapter's material also addresses the skeletal and muscular systems in addition to the central and peripheral nervous systems' composition and functioning. You will see a lesson on the different types of skin cells and the function of skin. The female reproductive system's internal and external anatomy are further discussed in the chapter. More lessons look at the kidneys, digestive system and male reproductive system. When you have finished looking over the lessons you should be able to:

  • Define heart attack
  • Discuss the phases of the cardiac cycle
  • Explain the lymphatic system's function and edema
  • Distinguish the central nervous system from the peripheral nervous system
  • Explain amylase
  • Identify the parts of the lower respiratory system
  • Describe osmoregulation
  • Discuss the importance of synovial fluid

Our professional instructors cover the large amount of information in this chapter with an engaging and effective teaching style. Our videos illustrate these complex body functions and come with lesson transcripts to look over as you watch each lesson. This chapter has practice quizzes available for you to assess your knowledge of the wide range of information on the human body.

19 Lessons in Chapter 1: Overview of the Human Body
Test your knowledge with a 30-question chapter practice test
Human Skin: Layers, Function & Structure

1. Human Skin: Layers, Function & Structure

This lesson will cover the three main layers of your skin, which includes the epidermis, dermis, and subcutis. In addition, we'll learn about other skin cells and tissue, such as adipose tissue, keratinocytes, melanocytes, and Merkel's cells.

The Skeletal System: Function and Terms

2. The Skeletal System: Function and Terms

You'll learn about the two major divisions of our skeleton, the axial and appendicular skeleton, in this video lesson. In addition, you will find out how bone is formed, thanks to tiny little cells called osteoblasts and osteoclasts, and what the major parts of a long bone are.

Joints: Structure and Functions

3. Joints: Structure and Functions

Find out what part of your body is affected when you tear your meniscus, how synovial fluid is made, what the synovial membrane helps to comprise, what a joint is, and why a joint capsule is important.

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.

Nervous System Overview: Central & Peripheral

5. Nervous System Overview: Central & Peripheral

What happens in your nervous system when you react to stimuli? Did you know that the brain is sometimes uninvolved with reflexes? Find out the answer to these questions, and more, in this lesson on the human nervous system.

Anatomy of the Heart: Blood Flow and Parts

6. Anatomy of the Heart: Blood Flow and Parts

In this lesson, you will take a look inside the heart and identify the chambers and one-way valves that make up this vital organ. You will also follow along as we trace the flow of blood through the heart chambers.

The Cardiac Cycle: Phases, Explanation & Terms

7. The Cardiac Cycle: Phases, Explanation & Terms

In this lesson, you will learn what happens during each heartbeat, or cardiac cycle. You will also learn that the heartbeat involves periods of relaxation and contraction, known as diastole and systole, respectively.

Types of Heart Conditions and Diseases

8. Types of Heart Conditions and Diseases

Your heart muscle receives a rich blood supply from the coronary arteries. If the coronary arteries become blocked, it can result in coronary heart disease, angina, heart attack or congestive heart failure. Learn how these conditions get started.

Functions of the Lymphatic System

9. Functions of the Lymphatic System

In this lesson, you will learn about the lymphatic system and the vital role it plays in keeping the cardiovascular system working. You'll discover how the lymphatic system (with its lymphatic vessels and capillaries) quietly works in the background to return leaked fluids back to the blood.

Gross Anatomy of the Airway and Lungs: Conducting & Respiratory Zones

10. Gross Anatomy of the Airway and Lungs: Conducting & Respiratory Zones

The respiratory system includes the lungs as well as other organs that help to get oxygen into the blood and carbon dioxide out of the blood. The conducting zone of the respiratory system carries oxygen into the lungs and carbon dioxide out of the lungs. The respiratory zone is where oxygen and carbon dioxide move into and out of the blood.

Gas Transport: Effect of Temperature, pH & Metabolism

11. Gas Transport: Effect of Temperature, pH & Metabolism

Hemoglobin carries almost all the oxygen to our metabolizing tissues. This lesson discusses physiological factors that stimulate hemoglobin to unload oxygen in our tissues. For example, temperature, carbon dioxide, pH and metabolism all influence the affinity of hemoglobin for oxygen.

Gas Transport: Cooperative Binding of Oxygen with Hemoglobin

12. Gas Transport: Cooperative Binding of Oxygen with Hemoglobin

Our cells need oxygen. Most of the oxygen is delivered to our cells bound to hemoglobin. This lesson describes how cooperative binding of hemoglobin maximizes oxygen delivery to our metabolizing tissues.

Digestive System I: The Upper Gastrointestinal Tract

13. 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

14. 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.

Gross Anatomy of the Urinary System

15. Gross Anatomy of the Urinary System

Our body must detoxify and cleanse itself to thrive. That is why we depend so heavily on our liver and urinary system. In this lesson, we'll explore how toxins are filtered by our organs and how urine is formed and expelled with the nephron, bladder, ureters, and urethra.

How the Kidneys Regulate Water Balance

16. How the Kidneys Regulate Water Balance

Water balance is essential to our health and survival. This lesson explores how the kidneys regulate water balance with special cells known as osmoreceptors and a process called osmoregulation. You'll also learn how this process relates to a rare form of diabetes known as diabetes insipidus.

Male Reproductive System: Functions, Organs & Anatomy

17. Male Reproductive System: Functions, Organs & Anatomy

Ever wonder what the inside of a male looks like? Find out in this lesson that explores the inner workings of the male reproductive system and the pathway that sperm takes.

Female Reproductive System: Internal Anatomy

18. Female Reproductive System: Internal Anatomy

Ever wonder where a female produces her eggs or how they get from the ovary to the uterus? Find out in this lesson about the internal reproductive anatomy of females.

External Anatomy of the Female Reproductive System

19. External Anatomy of the Female Reproductive System

We all know that men and women are different. But just how different are they? Learn a little more about the differences between men and women in this lesson on female external reproductive anatomy.

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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