2019年4月24日 · Compact bone, also called cortical bone, surrounds spongy bone and makes up the other 80% of the bone in a human skeleton. It is smooth, hard and heavy compared to spongy bone and it is also white in appearance, in contrast to spongy bone which has a pink color.

Compact bones are present in the outer layer of long bones, while spongy bones are present in the middle of the long bones. The main difference between spongy and compact bones is their structure and function.

Compact bone is dense so that it can withstand compressive forces, while spongy bone (also called cancellous bone) has open spaces and is supportive, but also lightweight and can be readily remodeled to accommodate changing body needs.

2025年1月15日 · The mechanical properties of bone are linked to its structural composition, with compact and spongy bone each contributing distinct strengths to the skeletal system. Compact bone, with its dense arrangement, provides tensile strength, allowing it to withstand substantial forces without deformation.

2013年1月31日 · Spongy bone is on the interior of a bone and consists of slender fibers and lamellae—layers of bony tissue—that join to form a reticular structure. Spongy bone is supplied by fewer and larger vessels than compact bone.

2023年10月10日 · Compact bone forms the outer layer of long bones and provides strength, support, and protection. On the other hand, spongy bone forms the inner layer of flat and irregular bones and contributes to shock absorption, reducing weight, and facilitating metabolic exchange. These bone structure differences are the reason for the classification.

Flat bones, like those of the cranium, consist of a layer of diploë (spongy bone), lined on either side by a layer of compact bone (Figure 6.9). The two layers of compact bone and the interior spongy bone work together to protect the internal organs.