1. 36.1 The Skeletal System

2. Periosteum Tough layer of connective tissue surrounding a bone.

3. Haversian Canal One of a network of tubes running through compact bone that contains blood vessels and nerves.

4. Bone Marrow Soft tissue inside the cavities within bones.

5. Cartilage Strong connective tissue that supports the body and is softer and more flexible than bone.

6. Ossification Process of bone function, during which cartilage is replaced by bone.

7. Joint Place where one bone attaches to another.

8. Ligament Strip of tough connective tissue that holds bones together at a joint.

9. Key Concept The skeleton supports the body, protects internal organs, provides for movement, stores mineral reserves, and provides a site for blood cell formation.

10. Key Concept Bones are a solid network of living cells and protein fibers that are surrounded by deposits of calcium salts.

11. Key Concept Depending on its type of movement, a joint is classified as immovable, slightly movable, or freely movable.