Parts of Long Bone

External and internal

Periosteum

thin, tough membrane that covers the outer surface of bones

Perforating fibers

strong collagen fibers that anchor the periosteum to the bone.

Epiphysis

rounded end portion of a long bone.

articular cartilage

hyaline cartilage on ends of bones that reduces friction

Medullary cavity

inside the long bone; contains bone marrow

diaphysis “shaft”

long middle portion of the bone. between epiphyses.

compact bone

outer layer surrounding the medullary cavity

spongy bone

porous, lightweight lattice-like network found inside the epiphyses

endosteum

thin membrane that lines inner surfaces of bone, such as the medullary cavity and the spaces within spongy bone

red bone marrow

soft tissue that performs hematopoiesis. Located in the spongy bone of the epiphysis

yellow bone marrow

stores fat inside the medullary cavity of the diaphysis.

nutrient artery

main blood vessel that supplies blood to bone; located in the diaphysis