Post on 09-Apr-2018
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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.