Structure of the skeletal system.

When your born you start with 350 bones in your body. As you grow up some bones join up and become one, so you'll have less bones. When you turn and adult the bones stop fusing and joining up together, by that time you should roughly have about 206 bones in your body.

1. Long bones- Long bones are found in the arm and legs, they're longer than they are wide, also they have marrow bone inside them.

2. Short bones- They bones are found on the ankles, wrist, fingers and on the feet. They're cube shaped bones. Small, but very strong.

3. Flat bones- These type of bones are very strong, so they can protect the vital organs (brain, heart and lungs).