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Excretory System
Excretion is an essential process in all forms of life. When cells metabolize—or break down—nutrients, waste products are produced. For example, when cells metabolize proteins and nucleic acids, nitrogen wastes such as ammonia, urea and uric acid are produced. Ammonia is a toxic substance and must be removed from the blood and excreted from the body. Urea is removed through urine, which is produced in the kidney. Excretion is also necessary to remove excess water, salts, and many other substances from the body.
Although the kidneys are the main organs of excretion of wastes from the blood, several other organs are also involved in excretion, including the large intestine, liver, skin, and lungs.
In Chapter 16, students will
study the path or urine, organs involved in urine formation
outline how excretion helps the body maintain homeostasis
analyze the structure of the kidney --> 3 major areas
analyze formation & composition of urine
examine water-salt & acid-base balance by the kidneys
Instructions - complete the following
Read Inquiry into Life text pg 301-315 or Digital Book p228-240 & 275-280.
Watch the following video lessons on the Excretory System
Lesson 1 - Introduction to the Excretory System
AI Summary
Lesson 2 - Homeostasis & the Kidney
AI Summary
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