The Skeletal System

1. The Skeletal System

2. Overview • What are Bones? • How Bones Grow • Your Spine • Your Ribs • Your Skull • Your Joints

3. What are Bones? Every bone in your body is made up of the same materials: • The outer surface of bone is called the periosteum • The next layer is made up of compact bone • Within the compact bone are layers of cancellous bone

4. How Bones Grow

5. Your Spine • The spine lets you twist and bend • Protects the spinal cord • Made up of 26 bones • These bones are called vertebrae • In between each vertebra are small disks made of cartilage • Cartilage act as your spine's natural shock absorbers

6. Rib Cage • Information on Ribs

7. Your Skull • Your skull protects the brain. • Your skull has changed since you were a baby. • As the baby grows, the space between the bones closes up and disappears, and joints called sutures connect the bones http://www.ehow.com/video_12159643_draw-skull-kids.html

8. Your Joints • The place where two bones meet is called a joint. • Some joints move and others don't. • One of the main types of moving joints is called a hinge joint.. • Another important type of moving joint is the ball and socket joint. You can find these joints at your shoulders and hips • Your joints come with their own special fluid called synovial fluid that helps them move freely. • MUSCLE AND JOINT INTERACTIVE

9. Conclusion • Your bones help you out every day so make sure you take care of them. Be Active! Stay Fit and Healthy!

10. References: • http://www.cyh.com/HealthTopics/HealthTopicDetailsKids.aspx?p=335&np=152&id=2523#5 • http://kidshealth.org/kid/htbw/bones.html • http://kidshealth.org/kid/htbw/SSmovie.html