What is the structural unit of bone called?

The structural unit of bone is known as the osteon, which is also referred to as the Haversian system. Each osteon consists of a central canal surrounded by concentric rings of mineralized matrix, called lamellae, which contain bone cells. This organization allows for the efficient distribution of nutrients and removal of waste within the bone tissue. The design of the osteon helps bones withstand mechanical stress and provides strength and support to the skeletal structure.

Osteoblasts and osteocytes are essential cells involved in bone formation and maintenance, but they do not represent the overall structural unit. Chondrocytes, on the other hand, are cells found in cartilage, not bone, and therefore do not relate to the question about bone structure.