Where is the blood forming tissue housed within a bone?

The blood-forming tissue, known as bone marrow, is primarily housed within the cancellous (spongy) bone found at the ends of long bones, such as the femur and humerus, as well as in the interior of flat bones like the pelvis and sternum. There are two types of bone marrow: red marrow, which is responsible for producing blood cells, and yellow marrow, which mainly stores fat. The marrow is contained within the medullary cavity, surrounded by the hard outer layer of compact bone.