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Ch 9: Digestive & Excretory Systems of the Human Body

About This Chapter

Use the lessons in this chapter to brush up on what you know about the digestive and excretory systems of the human body. Track your progress on your Dashboard.

Digestive & Excretory Systems of the Human Body - Chapter Summary

This chapter will help you refresh your understanding of the human digestive and excretory systems. You'll review the gastrointestinal tracts, nutrient absorption, the urinary system and more. By the end of the chapter, you'll have explored:

  • The process of digestion
  • Upper and lower gastrointestinal tracts
  • Role of the small intestine in digestion and the absorption of nutrients
  • How the body uses energy
  • Malabsorption of nutrients in the gastrointestinal tract
  • Energy deficiencies and malabsorption disorders
  • An explanation of the excretory system
  • Anatomy of the urinary system
  • Structures of the kidney

Our instructors have specially developed these lessons to help you easily absorb, interpret and retain the information. To remain engaged in the learning process, you can view inviting lessons. To navigate your way through the video lessons, utilize the clickable timeline included. After each lesson, take an interactive quiz to test your understanding. After completing all of the lessons, take the chapter exam to apply all that you've learned.

10 Lessons in Chapter 9: Digestive & Excretory Systems of the Human Body
Test your knowledge with a 30-question chapter practice test
What is Digestion? - Definition & Process

1. What is Digestion? - Definition & Process

This lesson will define the process of digestion. All parts of the gastrointestinal system will be discussed. Examples will be given when possible, and you'll have an opportunity to test your knowledge.

Digestive System I: The Upper Gastrointestinal Tract

2. 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

3. 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.

Small Intestine: Nutrient Absorption and Role In Digestion

4. Small Intestine: Nutrient Absorption and Role In Digestion

The majority of digestion and absorption of nutrients takes place in the small intestine. In this lesson, you will learn about unique modifications within the walls of the small intestine, such as microvilli, villi, and circular folds. These structures increase absorption of nutrients.

Energy Balance: How the Body Uses Energy

5. Energy Balance: How the Body Uses Energy

Energy balance is the relationship between the energy you take in and the energy you use. Learn how you take in energy from the foods you eat and how your body uses that energy for your basal metabolism, physical activity and food digestion.

Malabsorption in the GI Tract

6. Malabsorption in the GI Tract

We will cover the major causes and processes of malabsorption in the GI tract and how they may connect with one another in different ways. This will include taking a look at the organs of the GI tract and their respective diseases.

Malabsorption Disorders & Energy Deficiencies

7. Malabsorption Disorders & Energy Deficiencies

What's all of the hype around malabsorption disorders, and what did gluten ever do to anyone? Read on as we analyze the effects of energy deficiencies in malabsorption disorders, such as Crohn's disease, hypothyroidism, and diabetes.

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.

Gross Anatomy of the Urinary System

9. 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.

The Kidney: Major Divisions & Structures

10. The Kidney: Major Divisions & Structures

Learn about the major layers of the kidneys, like the renal cortex and renal medulla. Find out about the inner parts of the kidneys, including the renal papilla, renal pelvis, renal pyramid, and renal hilum.

Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken

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