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Lesson 3
The Excretory System
Skim Lesson 3 in your book. Read the headings, and look at the photos and illustrations.
Identify three things you want to learn more about as you read the lesson. Record your ideas
in your Science Journal.
Functions of the
Excretory System
Detail the 3 functions of the excretory system.
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.
The Excretory System
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.
Identify the materials excreted from the 4 systems that make up
the excretory system.
System
What It Excretes
Digestive
Urinary
Integumentary
Describe the organs and function of the urinary system.
Organs of the
Urinary System
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Urinary system consists of
.
2
2
that work together to
liquid waste
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Digestion and Excretion
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Respiratory
Lesson 3 | The Excretory System (continued)
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.
Describe the number, size and location of the kidneys.
Number:
Size:
Location:
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.
Identify 4 functions of the kidneys.
1.
2.
3.
4.
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.
Summarize the components of kidneys.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Each kidney
contains
about 1 million
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.
Define nephrons.
Nephrons:
.
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.
Summarize how urine is produced.
sometimes
Blood
is
as it passes
through the kidneys and
produces a fluid called
contains
products
.
Digestion and Excretion
153
Lesson 3 | The Excretory System (continued)
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.
Detail the 2 stages of filtration and urine production.
First filtration:
Second filtration:
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.
Sequence the flow of liquid waste through the organs of the
urinary system. Detail the function of each organ.
1 KIDNEYS:
3 BLADDER:
4
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Digestion and Excretion
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
2
Lesson 3 | The Excretory System (continued)
Summarize four common urinary disorders and their causes.
Urinary Disorders
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.
1. kidney disease:
cause:
2. urinary tract infection:
cause:
3. kidney stones:
cause:
4. bladder control problems:
cause:
Summarize how the excretory system interacts with other
The Excretory System
and Homeostasis
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
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systems to keep the body healthy.
.
Excretory System
works with
Circulatory System
Digestive System
filters
from
blood before it becomes toxic
removes
that could damage the body
Nervous System
interacts with
, which controls secretion of
the hormones that help
Describe how the organs of the urinary system work together.
Digestion and Excretion
155
Review
Digestion and Excretion
Chapter Wrap-Up
Now that you have read the chapter, think about what you have learned. Complete the What I
Learned column on the first page of the chapter.
Use this checklist to help you study.
Complete your Foldables® Chapter Project.
Study your Science Notebook on this chapter.
Study the definitions of vocabulary words.
Reread the chapter, and review the charts, graphs, and illustrations.
Review the Understanding Key Concepts at the end of each lesson.
Look over the Chapter Review at the end of the chapter.
Reread the chapter Big Idea and the lesson Key Concepts. Describe
how the digestive and excretory systems help maintain the body’s homeostasis.
Copyright © Glencoe/McGraw-Hill, a division of The McGraw-Hill Companies, Inc.
Challenge Compare the human digestive and excretory systems with the same systems in another
species. How are they alike? How are they different?
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Digestion and Excretion