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Ch 13: The Musculoskeletal, Circulatory, Respiratory, Digestive & Excretory Systems

About This Chapter

Use these short lessons to learn more about body systems such as the musculoskeletal, circulatory, respiratory, digestive and excretory systems. This chapter can serve as a homework study guide or a supplemental resource to your biology class textbook.

Physiology I: The Musculoskeletal, Circulatory, Respiratory, Digestive, and Excretory Systems - Chapter Summary

In this chapter, we'll review important systems of the body such as the respiratory system and the circulatory system and find out about their parts and purpose. The instructors teaching this chapter go over kinds of body tissue and the skeletal system, as well as the digestive, excretory, respiratory and circulatory system. Each lesson is short and comes with a multiple-choice quiz so you can test your knowledge before moving on. Use this chapter to learn to:

  • Understand multicellular organisms
  • Identify types of tissue in the body
  • Explain the relationship between the skeletal and muscular system
  • Name parts of the circulatory system
  • Show how gas is exchanged in the respiratory system
  • Understand the difference between the upper and lower gastrointestinal tract
  • See how the excretory system works
  • Understand the process of respiration

9 Lessons in Chapter 13: The Musculoskeletal, Circulatory, Respiratory, Digestive & Excretory Systems
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.

The Human Circulatory System: Parts and Functions

4. 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

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.

Digestive System I: The Upper Gastrointestinal Tract

6. 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

7. 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

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.

What is Respiration? - Definition, Process & Equation

9. What is Respiration? - Definition, Process & Equation

Respiration is a metabolic process common to all living things. Here, you will learn the definition, location, processes, and formula for cellular respiration. At the end, you can test your knowledge with a short quiz.

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