Thehumanbodysystems1 110612191335-phpapp01

The Human Body Systems
By the Fourth Grade Computer Class

The human body is like a complex organization that
has an important job to get done. In order to get
everything done perfectly and on time, it has to use a
system. Actually, the human body uses many systems
that work side by side.
The Human Body Systems
by Bobby

The Body Systems Work Together
 The heart is like the president of the
organization.
 Some of the body's systems are directly
connected to the heart, while others are not.
 Even if the heart is not directly involved in the
system, it still plays a part.
 If the heart isn't working, nothing else is working
either.
 The heart actively participates in the circulatory
system, while it just keeps an eye on the
respiratory and excretory systems.

The Body Systems
•The Digestive System
•The Skeletal System
•The Circulatory System
•The Muscular System
•The Nervous System
•The Respiratory System

Where Your Food Goes
When you eat your food,
do you know where it
goes? It goes into your
digestive system. Your
digestive system is made
up of your mouth, pharynx,
esophagus, liver, stomach,
small intestines, large
intestines, appendix,
rectum, and anus! That is
a lot of parts!

Care For Your Digestive System!
 Chew your food well
and swallow slowly!
 Drink plenty of water to
help move food through
your digestive system!

Facts About Your Digestive System
 It takes 2 to 3 weeks to digest gum.
 Juices in the stomach break down the
proteins.
 Food stays in your stomach for 2 to 3 hours.
 Food goes down your esophagus and into
your stomach where juices break down the
proteins. Then it goes down your small
intestine to the large intestine and gets
removed by the digestive system.

The Skeletal System
The skeletal system is
the system that
supports us and gives
us our shape.

Main Structures of the Skeletal System
•Two main structures form the
skeletal system: cartilage and
bone.
Cartilage is largely composed
of water and contains no
nerves or blood vessels.
Bones are hard on the
outside. Inside they are soft,
but strong. Red and white
blood cells are made inside the
bones.

The Circulatory System
By Nathaniel

The Circulatory System
The circulatory system performs many vital
functions. Your heart pumps blood and
nutrients to tissues all over the body. The
circulatory system is also important in the
removal of wastes and in several other body
processes.

The Main Organ of the Circulatory System
 The main organ of the Circulatory system is
the heart.
 The heart's primary function is to pump blood to
all parts of the body, bringing nutrients and
oxygen to the tissues and removing waste
products.

The Muscular System
The Muscular System is made up of 630 muscles.
By Kelli

The Muscular System Helps Your Body
Move
Most muscles work
together in pairs. One
muscle pulls while the other
muscle relaxes. When you
bend your arm the biceps
muscle pulls and the
triceps muscle relaxes.
When you make your arm
straight, the biceps muscle
relaxes and the triceps
muscle pulls.

The Function of Muscles
Muscles are very important. They help you do
almost everything — from pumping blood
throughout your body to lifting your heavy
backpack. You control some of your muscles
and others, like your heart, do their jobs without
you thinking about them at all.

Interesting Facts About Muscles
 Muscles are bundles of cells and fibers.
 Muscles work in a very simple way. All they do is
tighten up--that is, contract--and relax.
 You have two sets of muscles attached to many of
your bones which allow them to move.
 There are 630 active muscles in your body and they
act in groups.
 Muscles can only pull. They never push.

Did you know?
 You use 17 muscles when you smile.
 You use 43 muscles when you frown.

The Brain
 The brain is much more complex than the spinal
cord. It has many divisions within it.
 The brain stem controls most of the life systems
commands such as breathing and heartbeat.
 The cerebellum controls balance and the coordination
of muscles to move.
 The cerebral cortex is the most advanced part of the
brain. This is where conscious thought takes place.

The Spinal Cord
 The spinal cord is a long bundle of white
nerve matter that is found in the middle of the
spinal column. It is a link between the brain
and the body.

Function of the Respiratory System
The primary function of the respiratory system
is to supply the blood with oxygen in order for
the blood to deliver oxygen to all parts of the
body. The respiratory system does this through
breathing. When we breathe, we inhale oxygen
and exhale carbon dioxide. This exchange of
gases is how the respiratory system gets
oxygen to the blood.

The Respiratory System
Air is breathed in through
the nasal cavity and/or
mouth and down through
the throat (the pharynx).
The air passes down the
trachea (the windpipe),
through the left and right
bronchi, and into the
lungs. Oxygen in the
blood is delivered to body
cells.

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