Which type of bone is primarily responsible for hematopoiesis?

Cancellous bone, also known as trabecular or spongy bone, is primarily responsible for hematopoiesis, which is the process of blood cell formation. This type of bone is typically found at the ends of long bones and within the interior of others, including flat bones such as the pelvis and sternum. Cancellous bone contains red bone marrow, where the production of red blood cells, white blood cells, and platelets occurs.

The structure of cancellous bone, characterized by a network of trabeculae, provides a large surface area that facilitates the production and storage of these blood cells. Because it is less dense than compact bone, which surrounds it, cancellous bone can also help absorb shock and reduce the weight of the skeleton, enhancing mobility.

In contrast, compact bone, while crucial for providing strength and support, does not play a significant role in hematopoiesis as it typically contains yellow marrow, which is involved in fat storage rather than blood cell formation. Sutural bones are small, irregular bones found between the larger bones of the skull, and they do not participate in hematopoiesis. Long bones, while they do contain marrow, primarily support the body's weight and movement rather than being the main