NEET BIOLOGY

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: -The small space in the matrix, containing an osteocyte in bone or chondrocyte in cartilage is called as Lacunae. The Lacunae are situated between the lamellae and consist of a number of oblong spaces. Each lacuna is occupied during life by a branched cell, termed an osteocyte, bone-cell or bone-corpuscle.

Detailed explanation-3: -Lacuna is defined as a small space present in bone cells and cartilages. In compact bone, the osteonic canal is covered by concentric lamellae or rings of a matrix. Lacuna is the space between these rings where osteocyte bone cells are present. A single osteocyte cell can be present in one lacuna.

Detailed explanation-4: -Osteoblasts, bone lining cells and osteoclasts are present on bone surfaces and are derived from local mesenchymal cells called progenitor cells. Osteocytes permeate the interior of the bone and are produced from the fusion of mononuclear blood-borne precursor cells.

Detailed explanation-5: -Lacunae – Function The primary function of lacuna in bone or cartilage is to provide housing to the cells it contains and keeps the enclosed cells alive and functional. In bones, lacunae encase osteocytes; in cartilage, lacunae enclose chondrocytes.