1. The Skeletal System Chapter 8, Sec. 2

2. Key Terms ► Skeleton ► Ligament ► Compact bone ► Marrow ► Vertebra ► Cartilage ► Spongy bone ► Osteoporosis ► joint

3. Write these questions down Cornell style… ► What are the functions of the skeleton? ► What role do joints play in the body? ► What are the characteristics of bone, and how can you keep your bones strong and healthy?

4. I have about 206 bones but a baby has about 275 bones. Why do you think that is???

5. Your skeleton has 5 major functions 1. Provides shape and support 2. Enables you to move 3. Protects your organs 4. Produces blood cells 5. Stores minerals and other materials until your body needs them

6. *Fill out your skeleton chart

7. Joints, ligaments, and cartilage ► A joint is a place in the body where two bones come together ► Joints allow bones to move in different ways  Two kind of joints: ► Movable ► Immovable How are movable joints held together?

8. Bones ► Bones are complex living structures that undergo growth and development. ► What bone in your body do you think is the longest? ► Page 314

9. Types of bones ► Compact bone - hard and dense ► Spongy bone – has many small spaces in it ► Bone marrow – soft connective tissue inside the bone  Two types of bone marrow:  Red bone marrow  Yellow bone marrow

10. Bones are ALIVE ► They contain cells and tissues and blood and nerves ► They grow as you grow! The more you exercise…the stronger your bones become.

11. What is cartilage? ► Cartilage is a stiff yet flexible connective tissue found in many areas in the bodies of humans and other animals, including the joints between bones, the rib cage, the ear, the nose, the elbow, the knee, the ankle, the bronchial tubes and the intervertebral discs. It is not as hard and rigid as bone but is stiffer and less flexible than muscle. connective tissuebonesrib cageearnosebronchial tubesintervertebral discsbonemuscleconnective tissuebonesrib cageearnosebronchial tubesintervertebral discsbonemuscle

12. How can you take care of your bones? ► A combination of a balanced diet and regular exercise are important for a lifetime of healthy bones.

13. Osteoporosis ► A condition in which the body’s bones become weak and break easily