The smallest functional unit of bone is the osteon.
Understanding the Osteon
The osteon, also known as the Haversian system, is the basic building block of compact bone. It is responsible for providing nutrients and removing waste products from bone tissue.
Key Components of an Osteon
- Haversian Canal: This central canal contains blood vessels, nerves, and lymphatic vessels that supply the bone cells (osteocytes). The reference specifies that the Haversian canal consists of osteocyte's arterial, venous, and nerve supply.
- Lamellae: These are concentric layers or rings of bone matrix (collagen fibers and minerals) surrounding the Haversian canal. The reference mentions that the osteon is arranged with concentric lamellae of collagen fiber orientations.
- Osteocytes: These are mature bone cells located within small spaces called lacunae, which are situated between the lamellae.
Function of the Osteon
The osteon facilitates nutrient exchange and waste removal through its central canal. The arrangement of the lamellae provides strength and support to the bone.
