skeletal system. purpose support framework protects vital organs works with muscles to produce...
TRANSCRIPT
Purpose Support framework Protects vital
organs Works with
muscles to produce movement
Produces blood cells
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.
Bone (same function as the system.)
structural materialOuter “shell” is hard Inner portion is porous/spongy
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
Ligament Tough fiber that
connects bones together
Sprained ankles and knees are caused by stretched or torn ligaments
Joint Point where two
bones meet Ball and socket: hip
and shoulder Hinge: fingers,
elbows, and knees Pivot: Neck Gliding: wrist
Osteoporosis A condition in which the bones become thin and
brittle Break more easily Take longer to heal
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!
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
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
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
Seven ways to keep your skeletal system healthy
1. Eat food and beverages rich in calcium, phosphorus, and vitamin D
2. Wear protective equipment when playing sports
3. Exercise regularly to strengthen joints and ligaments
4. Sit, stand, and walk with correct posture