proximal epiphysis: attaches to trunk, joint point

distal epiphysis: farther from trunk

diaphysis: middle area of long bone

periosteum: layer of tissue that covers the outside of the long bone

endosteum: layer of cells covering the inside of the medullary cavity

compact/cortical bone: tough bone that is on the diaphysis

spongy/trabecular bone: bone that is on the epiphysis

red marrow: white blood cell filled marrow, in epiphysis

yellow marrow: fatty bone marrow in diaphysis

medullary cavity: open space in the diaphysis

articular cartilage: cartilage coating the epiphysis

central canal: main canal in an osteon, has blood vessels running through it

perforating canal: smaller canals that connect vessels and nerves

osteon: cylindrical unit of bone

lamellae: concentric layers that make up osteons

lacunae: Chambers for bone cells

osteocyte: bone cell, found in lacunae

canaliculi: channels that connect lacunae