skeletal system

functions of the skeletal system

-Supports the body

-Protects internal organs

-Provides for movement

-stores mineral reserves

-makes blood cells

bones

made of bone cells and protein fibers that are surrounded by deposits of calcium salts

compact bone

-Sick layer on the outside

-dense & hard

-arranged in a circular pattern

-haversian canals (blood vessels & nerves run through them)

spongy bone

-found beneath the compact bone, In the end of long bones in the middle of short, flat bones

-actually, hard and very strong, but has holes in it like a sponge

-Keeps the bones light

bone marrow

• soft tissue in the middle of spongy bone

• Make blood cells

• yellow bone marrow: Mostly fat storage

cartilage

-composes the skeleton of an embryo

-A strong connective tissue that supports the body and a softer and more flexible than bone

-covers the ends of bones

ossification

-when cartilage is replaced by bone during this process of bone formation

joint

-A place where one bone attaches to another bone

-permits bones to move without damaging each other

-classified as immovable, slightly movable, freely, movable depending on the type of movement

ligaments

-Connect bones to other bones

synovial fluid

lubricate joints to decrease friction almost completely