My Body: Bones
I have lots of bones inside my body.
Bones help my body stand up.
Bones are hard outside and soft inside.
A joint is where two bones meet.
Muscles help the bones move.
Inside our body is a skeleton. A skeleton is all the bones of the body joined to muscles, ligaments and tendons.
A skeleton supports the body and protects the body organs inside:
The skull bones protect the brain and gives us the shape of our face.
The spine, or backbone, protects the spinal cord, which is the message pathway between the brain and the body.
The ribs form a cage to protect the heart, lungs, liver and spleen.
The pelvis helps protect the bladder and intestines, and in women, the reproductive organs.
People have 206 bones.
The tiniest bone is inside the ear.
It is 3 millimetres long. It is called the stapes, or stirrup.
The longest bone is in the leg. It is called the femur.
|Go here to find the names of our bones
The body part that has the most bones is the hand.
We have 26 bones in each hand.
This is an x ray of a hand.
An x ray is a photograph of inside the body.
Bones are hard on the outside, and though light, they are very strong. Inside they are soft. Red and white blood cells are made from the bone marrow inside bones .
Bones also store minerals that the body needs.
Bones are made of calcium, phosphorous, sodium and other minerals, as well as a protein called collagen.
Bones need help from muscles and joints.
Muscles pull the joints so we can move, and help our body's inside movements, such as digestion. Muscles are joined to bones by tough tissues called tendons.
A joint is where two bones meet. There are different kinds of joints:
Some bend in only one direction, like a knee or elbow.
They are called hinge joints.
Some move in all directions, like a hip or shoulder.
They are called ball and socket joints, and allow the greatest freedom of movement.
Some turn from side to side, like a neck or wrist.
They are called pivot joints.
For more detail about the skeleton go here
If you use any part of this, write the
source in your bibliography like this:
Sydenham, S. & Thomas, R. Bones (2004). [Online], Available:www.kidcyber.com.au
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updated February 2010 © kidcyber