What does an osteon look like?

An osteon, also known as a Haversian system, is the fundamental structural unit of compact bone. It typically appears as a cylindrical structure composed of concentric layers of bone matrix, known as lamellae, arranged around a central canal that contains blood vessels and nerves. The osteon resembles a tree trunk in cross-section, with the central canal at the center and the lamellae forming rings around it. Additionally, small spaces called lacunae house osteocytes, which are bone cells embedded within the matrix.