Skeletal System

Skeletal System

• The framework of your body and it is made of 206 living bones (300 in babies)

5 Functions of the skeletal system

1. Gives shape and support to your body

2. Protects your internal organs

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3. Muscles attached to your bones help you move

4. Marrow in the center of bones makes blood cells (2.5 million/second)

5. Bones store calcium and phosphorus for our body

- Ca helps our heart and muscles work- P helps our cells produce and store energy- When stored in our bones, Ca and P help make bones

stronger

Joints

• Any place where 2 or more bones come together.

• Ligaments hold the bones together

5 types of joints

1. Immovable joint (little or no movement)-skull

2. Ball and Socket (circular motion)-hip and shoulder

3. Pivot (twisting motion)-forearm

4. Hinge (one direction)- elbow and knee

5. Gliding (bones slide past each other)- wrist