GENERAL HISTOLOGY

Detailed explanation-1: -Compact bone consists of closely packed osteons or haversian systems. The osteon consists of a central canal called the osteonic (haversian) canal, which is surrounded by concentric rings (lamellae) of matrix. Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae.

Detailed explanation-2: -The lamellae are the concentric circles around the Haversian canal; they are a bone matrix formed from calcium, phosphorus salts and fibres. The lacunae are small spaces in the lamellae which provide an area for bone cells or osteocytes.

Detailed explanation-3: -The concentric lamellae are arranged around the central canal, also known as the Haversian canal. Each central canal runs parallel to the long axis of the bone. It’s where blood vessels, lymph vessels, and nerves are located. It also contains a small amount of connective tissue.

Detailed explanation-4: -The concentric lamellae are like tubes of different size fitting inside each other to make an osteon. Running through the core of an osteons and along its axis is the central canal (= Haversian canal E) that contains blood vessels and nerves.