1. Skeletal System

2.  Functions: 1.Provides shape & support 2.Helps you move 3.Protects organs 4.Produces blood cells 5.Stores certain materials  Minerals & fat BrainPop video clip: Skeletal System

3. Skeletal System  Protects internal organs:  Skull … protects the brain  Ribs … protect the heart & lungs  Vertebrae … protects the spinal cord  Produces substances:  Femur … produces blood cells in the leg  Humerus … produces blood cells in the arm

4. Organs of the Skeletal System  Bones  Cartilage  Connective tissue that is more flexible than bone  Ex: nose, tops of ears, ends of bones  Ligaments  Hold bones together to form joints

5. Joints Pivot Joint A pivot joint allows one bone to rotate around another, such as the bones in your neck. Fixed Joint A joint between two bones that does not move. You have fixed joints in your skull.

6. Bone Marrow  Marrow – soft connective tissue found in spaces in bone  Red marrow  Produces the body’s blood cells  Yellow marrow  Stores fat (energy reserve)