ANATOMY

Detailed explanation-1: -Between the rings of matrix, the bone cells (osteocytes) are located in spaces called lacunae. Small channels (canaliculi) radiate from the lacunae to the osteonic (haversian) canal to provide passageways through the hard matrix.

Detailed explanation-2: -Osteocytes in their lacunae are now being appreciated for their dynamic functions in homeostatic adaptation of bone to mechanical forces [177]. Osteocytes maintain bone mass through anabolic activities and even as a dying osteocyte, they promote bone repair through recruitment of osteoclast mediated turnover.

Detailed explanation-3: -Lacunae are spaces in which bone cells are present. The main purpose of a lacuna in bone or cartilage is to provide a home for the cells it contains while also keeping them alive and functional. In bones, lacunae encase osteocytes; in cartilage, lacunae enclose chondrocytes.

Detailed explanation-4: -Bone lacunae are small, spindle-shaped spaces (appearing dark in this image), each containing an osteocyte that is left behind by osteoblasts during the process of remodelling. The long axis of each lacuna lies parallel to the lamella within which it resides.

Detailed explanation-5: -Answer and Explanation: The canals that connect osteocytes in their lacunae are called canaliculi. These tiny tunnels allow the osteocytes to exchange oxygen, nutrients, and waste products with the blood supply located in the central vein so the cells don’t die.