OBJECTIVE
In this multi-part lesson, we will study the urogenital system, starting with an examination of a fetal pig. Next, we will learn about the organs and functions of the excretory system. Finally, we will study the reproductive systems of males and females.
We will begin our study of the urogenital system by examining it in a fetal pig. We will use Froguts.
The excretory system consists of organs and glands that eliminate wastes, toxins, and excess water from the body and maintain homeostasis.
Homeostasis is the body's tendency to maintain a relatively stable internal state. The excretory system helps the body maintain its stability by filtering the blood of toxins and balancing the levels of water and salt in the body.
Excretion is the process of removing wastes, toxins, and excess water from the body. Some human body wastes are gases, some are solids, and some are in a liquid state.
Supporting Organs of the Excretory System
The urinary system is the primary excretory system; however, many other organs also contribute to it. The skin, lungs, liver, and large intestine are all parts of this system. While these organs are part of the excretory system, they also function independently of it because they are part of other organ systems.
The skin is the largest organ of the body. It gets rid of wastes through a process called perspiration, or sweating, which eliminates excess water and salts.
The lungs are the main organs of the respiratory system, but they are also important organs in the excretory system. The lungs excrete carbon dioxide, a waste product of respiration, which is the process of inhaling oxygen and exhaling carbon dioxide.
10
As an excretory organ, the liver produces bile, which helps break down fats. The liver also breaks down many substances in the blood, including toxins. For example, the liver breaks down protein and eliminates its toxic by-product, ammonia, as urea, which the kidneys filter from the blood and excrete in urine.
11
As a digestive organ, the large intestine absorbs water and salts from undigested food material. As an excretory organ, it eliminates solid waste products as feces during a bowel movement.
12
The Primary Excretory System
13
14
The URINARY SYSTEM is the primary system of the excretory system. The urinary system is made up of the kidneys, ureters, bladder, and urethra. Click on the arrows to learn about the parts of the urinary system.
15
OR WANNA TAKE A SHORT QUIZ?
16
BG1518_Excretory System
Maria Bowie
Created on March 24, 2026
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Transcript
OBJECTIVE
In this multi-part lesson, we will study the urogenital system, starting with an examination of a fetal pig. Next, we will learn about the organs and functions of the excretory system. Finally, we will study the reproductive systems of males and females.
We will begin our study of the urogenital system by examining it in a fetal pig. We will use Froguts.
The excretory system consists of organs and glands that eliminate wastes, toxins, and excess water from the body and maintain homeostasis.
Homeostasis is the body's tendency to maintain a relatively stable internal state. The excretory system helps the body maintain its stability by filtering the blood of toxins and balancing the levels of water and salt in the body.
Excretion is the process of removing wastes, toxins, and excess water from the body. Some human body wastes are gases, some are solids, and some are in a liquid state.
Supporting Organs of the Excretory System
The urinary system is the primary excretory system; however, many other organs also contribute to it. The skin, lungs, liver, and large intestine are all parts of this system. While these organs are part of the excretory system, they also function independently of it because they are part of other organ systems.
The skin is the largest organ of the body. It gets rid of wastes through a process called perspiration, or sweating, which eliminates excess water and salts.
The lungs are the main organs of the respiratory system, but they are also important organs in the excretory system. The lungs excrete carbon dioxide, a waste product of respiration, which is the process of inhaling oxygen and exhaling carbon dioxide.
10
As an excretory organ, the liver produces bile, which helps break down fats. The liver also breaks down many substances in the blood, including toxins. For example, the liver breaks down protein and eliminates its toxic by-product, ammonia, as urea, which the kidneys filter from the blood and excrete in urine.
11
As a digestive organ, the large intestine absorbs water and salts from undigested food material. As an excretory organ, it eliminates solid waste products as feces during a bowel movement.
12
The Primary Excretory System
13
14
The URINARY SYSTEM is the primary system of the excretory system. The urinary system is made up of the kidneys, ureters, bladder, and urethra. Click on the arrows to learn about the parts of the urinary system.
15
OR WANNA TAKE A SHORT QUIZ?
16