Skeletal system

You were born with 300 bones

Adults have 206

Some bones fuse together as you grow

Bones work with muscles for movement

Bones help maintain homeostasis by storing minerals and making blood cells.

Most bones start out as cartilage

Most bones have growth plates for future growth

Some cartilage is never replaced

where two or more bones meet

allow for movement when muscles contract

fixed joints allow little movement

ball and socket example: shoulder and hip

hinge example: elbows knees fingers

gliding example: wrist and ankle

saddle example: thumb and pivot example: neck

held together by connective tissue called ligaments

cartilage covers the ends of bones were they meet other bones