How does the structure of compact bone differ from that of spongy bone according to the chapter?

Compact bone is dense and has few internal spaces, forming most of the shaft of long bones. In contrast, spongy bone has a latticework structure with open areas, primarily found in the heads of long bones and in flat bones like those of the skull.

The structure of compact bone is characterized by its density and organization into repeating units called osteons, which consist of bone cells arranged in concentric rings around a central canal. This dense arrangement allows compact bone to provide strength and support. On the other hand, spongy bone features a network of tiny beams and plates that create a lighter structure with open spaces, which helps to brace the bone internally while also housing red marrow for blood cell production.