Which type of bone is filled with red bone marrow and fat cells at its ends?

Spongy bone, also known as trabecular or cancellous bone, is characterized by its porous and lightweight structure. This type of bone is primarily found at the ends of long bones and within the interior of others. Its architecture consists of a network of rod or plate-like structures that create a mesh-like framework.

One of the primary functions of spongy bone is to house red bone marrow, which is crucial for producing blood cells. Additionally, it contains fat cells, which are involved in energy storage. The spaces within the spongy bone are filled with this red bone marrow, facilitating hematopoiesis (the formation of blood cells) and providing a site for fat storage. This makes spongy bone integral to both the skeletal system's structural integrity and its metabolic functions.

In contrast, compact bone is denser and forms the outer layer of bones, providing strength and support but does not contain marrow within its structure. Yellow bone, or yellow bone marrow, primarily consists of fat cells and is found in the medullary cavity of long bones, but it is not typically associated with the ends of bones like spongy bone is. Cancellous bone is another term that can refer to spongy bone but lacks