BackMicroscopic Anatomy of Bones - The Osteon definitions
You can tap to flip the card.
Control buttons has been changed to "navigation" mode.
1/15BackSkip to main content
BackOsteon
The structural unit of compact bone, resembling tree rings, composed of concentric lamellae surrounding a central canal. Haversian system
Another name for the osteon, highlighting its role as the fundamental unit of compact bone. Central canal
A channel in the osteon containing blood vessels and nerves, running parallel to the bone's length. Lamellae
Concentric rings of bone matrix in the osteon, composed of collagen and hydroxyapatite, providing strength and flexibility. Lacunae
Small chambers within lamellae that house osteocytes, interconnected by canaliculi for nutrient exchange. Osteocytes
Mature bone cells residing in lacunae, maintaining bone tissue and facilitating nutrient exchange. Canaliculi
Tiny canals connecting lacunae, allowing for nutrient and waste exchange between osteocytes and the central canal. Perforating canals
Channels running perpendicular to central canals, connecting them to each other and to the bone's blood supply. Bone matrix
The intercellular substance of bone tissue, composed of collagen fibers and hydroxyapatite crystals. Collagen
A protein in the bone matrix providing tensile strength and flexibility, arranged in spirals within lamellae. Hydroxyapatite
A mineral in the bone matrix, primarily calcium phosphate, contributing to bone hardness and rigidity. Spongy bone
The porous, less dense bone tissue found inside bones, contrasting with the dense compact bone. Medullary cavity
The central cavity of bone shafts where marrow is stored, connected to the osteon via perforating canals. Diaphysis
The shaft or central part of a long bone, where osteons run parallel to the bone's length. Twisting forces
Stresses that can cause bones to break, resisted by the alternating direction of collagen fibers in lamellae.
Back
5:39
