Bone Anatomy

Lamellae

concentric layers that make up osteons.

Medullary cavity

open space in the diaphysis.

Canaliculi

channels that connect lacunae.

Periosteum

layer of tissue that covers the outside of the long bone.

Osteocyte

bone cell, found in lacunae.

Lacunae

Chambers for bone cells.

Central canal

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

Endosteum

layer of cells covering the inside of the medullary cavity.

smaller canals

Perforating canal that connect vessels and nerves.

Distal epiphysis

farther from trunk.

Proximal epiphysis

attaches to trunk, joint point.

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 in the diaphysis

spongy/trabecular bone

bone that is in 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