Raz Kids Inside Your Body

Written by Kira Freed • Illustrated by Cende Hill Visit www.readinga-z.com for thousands of books and materials.

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LEVELED BOOK • M Written by Kira Freed • Illustrated by Cende Hill

Inside Your Body www.readinga-z.com

Inside Your Body Inside Your Body

A Reading A–Z Level M Leveled Book • Word Count: 634

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Inside Your Body
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Table of Contents 3 4 Introduction
Introduction 4 The human body is an amazing machine
Skeletal System 5 3 4 It has many parts that form systems The
Muscular System 7 systems work together to keep you alive
Nervous System 8 and healthy Let’s look at some of your
Respiratory System 10 body’s systems
Circulatory System 11
Digestive System 12 The joint that joins your arm
Reproductive System 14 and shoulder lets your arm
Conclusion 15 rotate The joints at your
Index 16 elbows and knees let your
lower arms and legs move
Inside Your Body • Level M up and down If it were not
Inside Your Body • Level M for moving joints, you could
not walk, run, and swim
34 Inside Your Body • Level M

Skeletal System Table of Contents
Introduction 4
There are 206 bones in your body that Skeletal System 5
make up your skeleton Your bones Muscular System 7
give your body shape and strength Nervous System 8
They also protect your inner organs Respiratory System 10
Circulatory System 11
Most of the bones in your body are Digestive System 12
linked together at joints There are Reproductive System 14
different kinds of joints Different joints Conclusion 15
let body parts move in different ways Index 16

Inside Your Body • Level M
Inside Your Body • Level M
Introduction

The human body is an amazing machine
It has many parts that form systems The
systems work together to keep you alive
and healthy Let’s look at some of your
body’s systems

56

56

56 Inside Your Body • Level M

Muscular System Nervous System

Muscles control the movement of Your brain and thousands of miles of nerve
your body There are three kinds fibers form your body’s communication
of muscles Skeletal muscle is the system The brain is the control center
muscle that is attached to bones It receives information from your sense
It makes your arms, legs, fingers, organs—eyes, nose, ears, tongue, and skin
eyes, and other body parts move
Cardiac muscle is the strong heart The brain tells muscles what to do If your
muscle It works around the clock fingers go near something hot, a signal
Smooth muscle is found in your goes to the brain It then sends a signal to
skin, stomach, and other organs tell your hand to move away

Inside Your Body • Level M 78

Inside Your Body • Level M 78

Nervous System 7 Inside Your Body • Level M
Your brain and thousands of miles of nerve
The brain controls many functions offibers form your body’s communication Respiratory System Muscular System
your body without your thinking aboutsystem The brain is the control center Muscles control the movement of
them You breathe, your heart beats,It receives information from your sense This system takes care of breathing your body There are three kinds
and you digest food without thinkingorgans—eyes, nose, ears, tongue, and skin Oxygen is part of the air that you breathe of muscles Skeletal muscle is the
It just happens Air enters through your nose and mouth It muscle that is attached to bones
The brain tells muscles what to do If your travels to your lungs through your trachea, It makes your arms, legs, fingers,
fingers go near something hot, a signal or windpipe Once air is in your lungs, eyes, and other body parts move
goes to the brain It then sends a signal to blood removes the oxygen and takes it Cardiac muscle is the strong heart
tell your hand to move away to the cells of your body Your lungs also muscle It works around the clock
remove carbon dioxide from blood The Smooth muscle is found in your
8 carbon dioxide leaves your body every skin, stomach, and other organs
For other things, the brain tells muscles time you breathe out
what to do The brain decides what to do Inside Your Body • Level M
based on information from your sense organs 10
What it does depends a lot on what you have been taught
If you see the problem 2 + 2 = ?, you know the answer 10
because you were taught how to add

Inside Your Body • Level M 9
Inside Your Body • Level M
9

9 10

Circulatory System Digestive System

The circulatory system is made up of Digestion breaks down the food you
your heart and blood vessels Your heart eat Food must be broken into very
pumps blood through your body It never tiny particles so that it can be carried
rests Blood delivers food and oxygen to by the blood to cells When food
every cell in your body It also picks up enters your mouth, it mixes with
waste products from cells and takes them saliva, or spit Saliva begins digesting
to the lungs and kidneys The waste then the food When you swallow, food
leaves your body travels down a long tube to your
stomach, where it mixes with other
Inside Your Body • Level M chemicals that digest it more
Inside Your Body • Level M
11 12

11 12

Digestive System 11 Inside Your Body • Level M

Then the food enters your small Digestion breaks down the food you Reproductive System Circulatory System
intestine Here, more chemicals eat Food must be broken into very Humans must reproduce The circulatory system is made up of
mix with the food Blood moving tiny particles so that it can be carried in order to survive Special your heart and blood vessels Your heart
through the walls of the small by the blood to cells When food organs and glands in the pumps blood through your body It never
intestine carries away the digested enters your mouth, it mixes with reproductive system allow rests Blood delivers food and oxygen to
food Food that is not digested saliva, or spit Saliva begins digesting humans to make new every cell in your body It also picks up
continues on to your large intestine the food When you swallow, food human beings waste products from cells and takes them
It is then removed as waste travels down a long tube to your to the lungs and kidneys The waste then
stomach, where it mixes with other 13 14 leaves your body
Inside Your Body • Level M chemicals that digest it more
Inside Your Body • Level M 13 14 Inside Your Body • Level M
12

13 14

Index

Conclusion brain, 8 sense organs, 8
This is a look at some breathing, 10 skeletal muscle, 7
important systems in your
body Many other parts also cardiac muscle, 7 skeleton, 5
help you stay strong and
healthy You can help your heart, 11 small intestine, 13
body do its job by eating well
and getting exercise You can joints, 6 smooth muscle, 7
also help by avoiding stress large intestine, 13 stomach, 12
and unsafe situations saliva, 12 trachea, 10

Inside Your Body • Level M 15 16
Inside Your Body • Level M
15 16
Notes
16 15 Conclusion

sense organs, 8 brain, 8 Notes This is a look at some
skeletal muscle, 7 breathing, 10 important systems in your
skeleton, 5 cardiac muscle, 7 body Many other parts also
small intestine, 13 heart, 11 help you stay strong and
smooth muscle, 7 joints, 6 healthy You can help your
stomach, 12 large intestine, 13 body do its job by eating well
trachea, 10 saliva, 12 and getting exercise You can
also help by avoiding stress
and unsafe situations

Inside Your Body • Level M

Index

Inside Your Body • Level M 17 18