39816771 the Human Body Systems2

8/8/2019 39816771 the Human Body Systems2

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The Human Body Systems

By the Fourth Grade Computer Class


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The Body Systems

Everyone is different. We have different

skin colors, hair colors, body shapes and

sizes but we all look alike inside. If youcould peek inside your own body, what

would you see? Hundreds of bones, miles

of blood vessels, and trillions of cells, all of

which are constantly working together,doing all kinds of different things.

By Kendra


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The Digestive System

By Erin


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The Digestive Tract


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First Organs of the Digestive Tract

The mouth and teeth are

the first organs of the

digestive tract.

The teeth are bones

whose main purpose is to

grind food into bits that the

body can digest.

Saliva helps begin to

break down food.


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The Esophagus

The esophagus runs from the pharynx tothe stomach.

The esophagus is about 25 cm ( 10

inches) long. The esophagus is really a large muscle

which pushes food down to the stomach.


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The Stomach

The stomach is a J- shaped muscle.

The stomach acts as a churn.

Chemical breakdown of food begins in the

stomach.


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The Small Intestine

The small intestine is the main organ of the of thedigestive tract.

The small intestine absorbs processed food intothe bloodstream to deliver to the cells. Theunabsorbed food then passes to the largeintestine.


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The Large Intestine

.

The large intestine is about 5 feet long.

The main job of the large intestine is absorb

water and to get rid of unwanted materials.


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The Skeletal System

The Skeletal System is made up

of bones, ligaments, and tendons.

By Cody


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Function of the Skeletal System

Protects our vital organssuch as the brain, the heart,and the lungs.

Gives us the shape that wehave. Without it, we would

just be a blob of blood andtissue on the floor.

Allows us to move. Because

our muscles are attached toour bones, when ourmuscles move, they movethe bones, and we move.


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How Bones Work

Our bones don't work on their own. The

bones join together to form joints. The end

of each bone is covered by a tough,

smooth shiny substance called cartilagethat works like oil in a car. All of this is so

your bones won't scratch and bump

against each other when you move. Ourbones are held together by strong stretchy

bands called ligaments.


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Interesting Facts

The smallest bones in the body are found in the ear.

The longest bone in the body is the femur.

The bones are filled with something called bone marrowwhich makes red and white blood cells.

Overhalf the body's bones are in the hands and feet.

The only joint-less bone in your body is the hyoid bone inyour throat.

As your bones grow, you get taller.

When you were born, your skeleton had around 350 bones.By the time you become an adult, you will only have around206 bones. This is because, as you grow, some of the bones

join together to form one bone.


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The Circulatory System

By Fabian


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Circulatory System

The circulatory system

consists of the heart,

blood vessels, and

blood.

The heart is a muscular

organ about the size of a

fist.

It beats about 70 to 90

times a minute, pumpingblood though the blood

vessels.


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The Heart

The heart has two

sides, right and left,

separated by a thick

muscular wall. Eachside has two

chambers.


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The Muscular System

There are more than 600 muscles in the human body.

By Lindsey


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The Function of Muscles

Muscles help you do almost

everything from pumping

blood throughout your body

to lifting heavy objects. You control some of your

muscles, and others, like

your heart, do their jobs

without you thinking aboutthem at all.


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How Muscles Work

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.

Muscles can only pull. They never push.


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The Nervous System

The main parts of the Nervous

System are the Brain, the Nerves,

and the Spinal Cord.

By Hayden


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The Nervous System

The spinal cord is the main pathway for

information connecting the brain and

peripheral nervous system.

The human spinal cord is protected by

the bony spinal column.

The spinal column is made up of bones

called vertebrae.


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Nerves

All through our body there are nerves which

connect to the spinal cord.

This is called the nervous system. Messages

from the nerves travel to the spinal cord, whichsends them to the brain.

The brain works out what the messages are so

we know what we are seeing, touching, hearing,

and tasting, and if something hurts or feels.


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The Spinal Cord

We each have a backbone, called a spine.

Inside it there is a spinal cord. The spinal

cord joins the brain at the top of our neck. Its

main function is to serve as a pathway for

the messages from the nerves to travel to

the brain and back so we know what we are

seeing, touching, hearing, and tasting, and ifsomething hurts or feels.


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The Brain

Inside our head is the brain. It controlshow our bodies work and is protected bythe a thick bone called the skull.

The brain makes sure our hearts keepbeating and our lungs keep workingwithout us having to think about it.

Part of the brain makes our muscles work.

The biggest part of the brain makes usthink, see, hear, feel and taste.


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Respiratory System

By: Brooke


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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 main parts of the

Respiratory System arethe Nose, Mouth, Lungs,

Trachea, Diaphragm.


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When you Breathe

Did you know that

when you breath, air

goes through yourRespiratory System?

The Respiratory

System is made up of

your nose, throat,trachea, and lungs.


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Take Care of Your Respiratory System!

Dont smoke.Smoking damagesyour Respiratory

System. Exercise to

strengthen yourbreathing muscles.

If you ever havetrouble breathing, tellan adult at once.


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Smoking Damages Your Lungs

Do you smoke?

If you smoke this is

what your lungs will

look like.

If you don't smoke this

is what your lungs willlook like.

39816771 the Human Body Systems2

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