The bone marrow, a hematopoietic tissue located in the medullary cavity of the bones, is home to the hematopoietic stem cells that give rise to all blood cells. There are two types of bone marrow: red bone marrow, which is the site of hematopoiesis (blood cell production),and yellow bone marrow, which is mainly fatty.
Hematologic diseases such as leukemia and lymphoma are often associated with changes in the bone marrow. Bone marrow transplantation is a curative treatment for many of these diseases, allowing a healthy hematopoietic system to be reconstituted.
