Compact Bone: Also known as cortical bone, it forms the dense outer layer of bone. It consists of tightly packed osteons or Haversian systems, which are cylindrical structures that contain a central canal surrounded by concentric lamellae. Spongy Bone: Also referred to as cancellous or trabecular bone, it is found at the ends of long bones and in the interior of other bones. It consists of a network of trabeculae, which are rod-like structures that help distribute stress and reduce bone weight.
