MICROANATOMY

Detailed explanation-1: -The Haversian canals surround blood vessels and nerve fibers throughout the bone and communicate with osteocytes . The canals and the surrounding lamellae are called a Haversian system (or an osteon).

Detailed explanation-2: -Compact Bone 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-3: -The alternating bright and dark concentric rings (lamellae) are due to an alternating arrangement of collagen fibres in the bone matrix. The collagen fibres in each layer are parallel to each other, but at right angles to the fibres in the alternating layers on either side.

Detailed explanation-4: -The correct option is A Bone. Bone: The matrix of the bone is in the form of concentric rings called lamellae. The fluid filled spaces present between the lamellae are called lacunae in which are present the bone cells called osteocytes that communicate with each other by a network of fine canals called canaliculi.

Detailed explanation-5: -Lamellae. It’s the extracellular matrix around the cells that gives compact bone its hardness and rigidity. This matrix is made of both organic and inorganic materials. For example, collagen provides tensile strength and hydroxyapatite crystals provide the bone with compressive strength.