- contains units called "OSTEONS" or "harverian system" formed the concentric lamellae (rings of calcified matrix)
- repeating structural unites = osteons
- compact tissue = many osteons
Porous (but hard) inner-most layer (distal ends of long bones) pores filled with red bone marrow red bone marrow site (no osteons)
End of long bones, mainly composed of cancellous bone, houses much of red marrow involved in red blood cell production. Also one primary site for bone growth ( can be vulnerable to injury during growth).
Shaft of a long bone.
Comprises compact bone surrounding a central cavity.