The Skeletal System

Functions of the Skeletal System Supports and protects the body. Allows the body to move. Produces red blood cells. Stores minerals.

support Bones provide support for your body. –If you did not have bones, you would be a blob of tissue on the floor.

protection Bones protect organs. –ribs protect your heart and lungs –vertebrae protect your spinal cord –skull protects your brain

storage Bones store minerals. –The hard, outer compact bones can store calcium. –Yellow marrow inside bones stores fat.

blood cell production Long bones produce red blood cells. –Inside larger bones like the arm and leg bones there is a soft tissue called marrow. –Red marrow produces red blood cells. Red blood cells carry oxygen around the body.

movement Bones allow us to move –They provide a place for muscles to attach

The Skeletal System Is made up of: –bones –ligaments –cartilage –joints

bones Infant or baby –305 bones Adult –206 bones –Bones in the skull, pelvis, spine, and long bones fuse.

bones Bones grow –Bones have growth plates while you are growing. –These close and become solid around age 20.

bone characteristics Bone is alive –Full of blood vessels –Contains nerves (pain if broken) Bone is made mainly of 2 minerals –Calcium –Phosphorous Bone grows and changes all the time.

spongy bone compact bone periosteum bone marrow growth plate

ligaments ligaments - tough, flexible strand of connective tissue that holds bones together. –Found at the ends of bones vocabulary word!

cartilage cartilage – strong, flexible connective tissue found at the ends of bones that cushions joints. –Ears and nose tip are made of cartilage. vocabulary word!

joints joints – the place where two or more bones connect. –moveable joints allow movement sliding gliding ball and socket hinge –fixed joints limit movement skull pelvis vocabulary word!

Which cell part is like the skeletal system? cytoskeleton and cell wall