1. The Skeletal System

2. The skeletal system consists of: 1. Bones 2. Cartilage 3.Connective tissue ***There are about 206 bones in an adult

3. Bone Functions 1.Protection Heart/ lungs: ribs Spinal cord: vertebrae Brain: skull 2.Storage Bones store minerals that help muscles and nerves work Long bones store fat for energy

4. Bone Functions continued 3.Movement Skeletal muscles pull on bones to help you move 4.Blood cell formation Some bones are filled with marrow, which makes blood cells.

5. Internal Structure of Bone

6. Parts of Bone Compact bone: No visible spaces, contains blood vessels Spongy bone: Has open spaces, but provides strength and support

7. Parts of bone continued Red Marrow: Makes red and white blood cells Yellow Marrow: Stores fat in long bones Cartilage: Flexible connective tissue that is sometimes replaced by bone

8. Osteoblasts Cells that make bone by depositing connective tissue and minerals