HealthMrs. Wagner

Support your body Give it shape Work with muscles so you can move Bones – store important minerals and

release them to the body

Axial Skeleton – bones in your head, your breastbone, your ribs and in your backbone

Appendicular Skeleton – All the other bones in your body

Cranium – thick, hard part of skull that encloses the brain and protects it

Jawbone – only bone in skull that can move Vertebrae – 33 bones in spinal column –

support head and give flexibility to neck and back. Protects spinal cord

Cartilage – tough, supportive tissue that is softer and more flexible than bone – separate individual vertebrae from each other

Arms, hands, feet, legs, hips and shoulders

Joints – point at which two bones come together

Ligaments – strong, fibrous bands hold bones together at moveable joints .

Immovable joints – cannot move –Cranium

Moveable joints - 4 types

1. Hinge – back and forth movement - Knees, elbow

• 2. Ball and Socket – movement in all directions- Shoulder

• 3. Pivot – Side to side- neck at vertebrae

• 4. Gliding – bones to slide over one another- wrists and ankles

206 in body Marrow – soft tissue inside of the bone –

Red blood cells produced Ossification – body replacing cartilage

with bone – born with cartilage – age 20 – 25

Fracture – break in the bone Dislocation – ends of the bones are forced

out of their normal positions in a joint Sprain – overstretched or torn ligaments or

tendons Torn cartilage – serious damage to the

cartilage that covers the ends of bones in a joint

Bursitis – painful irritation of the fluid-filled sac that cushions certain joints

Arthritis – joints become painful and swollen

Scoliosis – abnormal curvature of the spine – more common in girls – twists sideways

Osteoporosis – bones become weak and break easily due to a loss of calcium