About This Chapter
Excretory System Overview - Chapter Summary
This chapter includes lessons on the excretory system. You will go over examples of homeostasis and the stages of urine formation. You will also gain an understanding of how the glomerulus functions. After completing the chapter, you should feel confident and ready to:
- Explain how the excretory system removes toxic substances from the body
- Provide examples of excretion in humans and animals
- Describe the inner parts of the kidneys
- Recall how major corpuscular structures work
- Explain how the renal tubule functions
- List the three processes of urine formation
- Detail how the kidneys regulate water balance
- Discuss common conditions that affect the kidneys
These engaging lessons can help you easily understand the topics presented. Each lesson is accompanied by a brief quiz to assess how much of the content and details you can remember. Video timelines let you skip around and study only the topics you need to review.
1. 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.
2. Excretion: Definition & Examples
In this lesson, we'll explore the varied ways that plants, animals, and cells excrete toxic substances and metabolic wastes. We'll look at some of the specialized structures that humans and animals have to complete these necessary excretory tasks.
3. 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.
4. The Nephron: The Glomerulus's Major Structures and Functions
Together, the glomerulus and Bowman's capsule make up the renal corpuscle of the nephron. These parts of the nephron filter blood and are vital to our body's survival. In this lesson, you'll explore the major corpuscular structures and their functions.
5. The Renal Tubule: Definition, Function & Terms
Renal tubules are essential structures in the kidneys. This lesson explores the function of the renal tubule and its parts, including the proximal and distal convoluted tubules, the loop of Henle, and the collecting duct. Learn how these components work together to absorb materials and form urine.
6. 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!
7. 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.
8. What Is Homeostasis? - Definition & Examples
Homeostasis can be defined as a property of an organism or system that helps it maintain its parameters within a normal range of values. It is key to life, and failures in homeostasis can lead to diseases like hypertension and diabetes.
9. Pathologies of the Kidneys
We will look at the most common conditions that affect the kidneys and their causes. The diseases that infect the kidneys will also be covered. The lesson will go over the signs and symptoms associated with each pathology.
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