BIO long bones

periosteum

thin surrounding layer of dense connective tissue

periosteal blood vessel

blood vessel that penetrates the periosteum

osteon

the basic unit of bone, only in compact bone, concentric circles

lamella

concentric layers of bone tissue

central canal

tube at the center of an osteon, has blood vessels

lacuna

small cavities, where osteocytes live

osteocytes

mature bone cells

canaliculus

connect to lacunae/osteocytes

perforating canal

provide blood to central canals

spongy bone

is a porous bone tissue

endosteum

thin layer of connective tissue, lines bone cavities

red bone marrow

contains blood stem cells that can become red blood cells, white blood cells, or platelets, in medullary cavity of long bone

yellow bone marrow

makes red blood cells, inside spongy bone

diaphysis

bone shaft

proximal epiphysis

end of the bone closest to the point of origin

distal epiphysis

end of the bone further from the point of origin

medullary cavity

hollow space within the shaft

compact bone

very dense bone tissue

spongy bone

lighter bone tissue

epiphyseal line

scar tissue (adults), growth plate