Which cells of bones secrete the matrix Haversian canal?

The cells that secrete the matrix of Haversian canals in bones are called osteoblasts. Osteoblasts are responsible for the synthesis and deposition of new bone matrix, a mineralized tissue that provides structural support and protection to the skeleton. They are derived from mesenchymal stem cells and are located along the surface of the bone, including within the Haversian canals.

The Haversian canals are microscopic channels found within the bone tissue that run parallel to the long axis of the bone. Each Haversian canal contains a blood vessel, nerve fibers, and lymphatic vessels, surrounded by concentric layers of bone tissue called lamellae. Osteoblasts line the Haversian canals and are responsible for the deposition of the new bone matrix, which consists primarily of collagen fibers and calcium phosphate minerals.

The process of bone formation, also known as ossification or bone mineralization, involves the sequential actions of osteoblasts, osteocytes, and osteoclasts. Osteoblasts secrete the matrix, osteocytes become embedded within the matrix as mature bone cells, and osteoclasts are responsible for bone resorption to maintain bone balance and remodeling.