1. Skeletal System

2. Purpose Support framework Protects vital organs
Works with muscles to produce movement
Produces blood cells

3. Facts Your skeleton is made up of 206 bones.
Bones start out as flexible cartilage but within a few weeks begin to develop into hard deposits of calcium (through a process called ossification.)
It takes roughly 20 years for the bone process to be completely hardened.
Bones are made up of types of material: compact and spongy (porous) bone.
Bone marrow forms red and white blood cells.

4. Bone (same function as the system.)
structural material
Outer “shell” is hard
Inner portion is porous/spongy

5. Bone marrow Produces blood cells
soft tissue in center area of most bones

6. Cartilage Acts as a cushion where bones meet
Soft, connective tissue on the end of some bones
Vertebrae
Knee and hip joints
End of your nose

7. Ligament Tough fiber that connects bones together
Sprained ankles and knees are caused by stretched or torn ligaments

8. Joint Point where two bones meet Ball and socket: hip and shoulder
Hinge: fingers, elbows, and knees
Pivot: Neck
Gliding: wrist

9. Osteoporosis A condition in which the bones become thin and brittle
Break more easily
Take longer to heal

10. Why should teens care? After age 30 you stop adding bone
If you don’t have enough calcium in your diet, your body takes it from your bones, leading to bone loss
You CANNOT make it up later; this is your ONE chance
Build up your savings account now!

11. Problems: Fractures: a break in a bone
Dislocation: a bone being pushed out of joint
Sprain: stretching or twisting of a ligament
Osteoarthritis: a breakdown of cartilage caused by wear and tear
Scoliosis: a sideways curvature of the spine

12. Diet and Osteoporosis
Calcium and phosphorous form the hard substance in bone
Foods high in calcium: milk and milk products, and dark green leafy vegetables
Vitamin D helps your body absorb calcium
Our bodies make vitamin from sun exposure
Most milk and milk products in the US are fortified with Vitamin D
Teens need 4 servings of calcium rich foods every day

13. Physical activity and Osteoporosis
Weight-bearing physical activity 2 to 3 times per week
sends signals to your body to make the bones stronger
Physical activity 60 minutes every day
Stronger muscles protect joints

14. Seven ways to keep your skeletal system healthy
Eat food and beverages rich in calcium, phosphorus, and vitamin D
Wear protective equipment when playing sports
Exercise regularly to strengthen joints and ligaments
Sit, stand, and walk with correct posture

15. 5. Warm up before participating in physical activity
6. Get screened for scoliosis
7. Wear properly fitting, well-cushioned shoes