About This Chapter
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
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.
2. 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.
3. 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.
4. 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.
5. 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.
6. 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.
7. 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.
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