Copyright

Ch 6: Digestive & Excretory Systems in Humans

About This Chapter

In this overview of digestive and excretory systems in humans, learn about the upper and lower gastrointestinal tract, movement through the small and large intestines, the kidneys, and more. These brief lessons are great for individuals preparing for an exam.

Digestive & Excretory Systems in Humans - Chapter Summary

This chapter includes lessons on digestive and excretory systems in humans. There are discussions covering absorption of nutrients, enterogastric reflex, and electrolyte balance. You'll also gain an understanding of why close to 400,000 people in the U.S. undergo dialysis treatment each year. After completing the chapter, you should be prepared to:

  • Discuss the beginning of the digestive process, including digestive enzymes in your saliva
  • Explore the lower gastrointestinal tract and the last stages of the digestion process
  • Explain intestinal movements, like peristalsis and segmentation
  • Describe modifications within the walls of the small intestines and nutrient absorption
  • Discuss how the large intestine prepares the body for the elimination of feces
  • Explore the excretory system and how excess fluid is removed
  • List three stages in urine formation
  • Explain how the kidneys regulate water and acid base balance

These brief and engaging video lessons help you quickly understand the topics presented, and our expert instructors provide plenty of examples. You can review all the lessons in order, or just look at the ones that cover the topics you need to review. A brief multiple-choice quiz is available for each lesson to test your knowledge, and the quizzes have links back to specific topics in the video just in case there are areas you need to review further.

9 Lessons in Chapter 6: Digestive & Excretory Systems in Humans
Test your knowledge with a 30-question chapter practice test
Digestive System I: The Upper Gastrointestinal Tract

1. 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

2. 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.

Movement Through the Small Intestine: Peristalsis, Segmentation & Pendular Movement

3. Movement Through the Small Intestine: Peristalsis, Segmentation & Pendular Movement

The small intestine is an important organ for digestion and absorption of nutrients. In this lesson, you will learn about the enterogastric reflex. You will also learn how intestinal movements, such as peristalsis, segmentation, and pendular movement, improve digestion and absorption.

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.

Rectum, Functions of the Large Intestine & Water Absorption

5. Rectum, Functions of the Large Intestine & Water Absorption

The large intestine is the final processing area for digested food. In this lesson, you will learn how the large intestine removes water from undigested food and prepares for the elimination of feces through the anus.

Excretory System

6. 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 Three Processes of Urine Formation

7. The Three Processes of Urine Formation

Urine may be a waste product, but it is a carefully created waste product. There are three main stages in urine formation, and this lesson covers them all!

How the Kidneys Regulate Water Balance

8. 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.

How the Kidneys Regulate Acid Base Balance

9. How the Kidneys Regulate Acid Base Balance

Find out how your kidneys keep you alive by excreting acids and bases in conditions like respiratory acidosis, metabolic alkalosis, metabolic acidosis, and respiratory alkalosis.

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

Earning College Credit

Did you know… We have over 200 college courses that prepare you to earn credit by exam that is accepted by over 1,500 colleges and universities. You can test out of the first two years of college and save thousands off your degree. Anyone can earn credit-by-exam regardless of age or education level.

To learn more, visit our Earning Credit Page

Transferring credit to the school of your choice

Not sure what college you want to attend yet? Study.com has thousands of articles about every imaginable degree, area of study and career path that can help you find the school that's right for you.

Support