Bone marrow Bone marrow Bone marrow is a semi-solid tissue which may be found within the spongy or cancellous portions of bones. In birds and mammals, bone marrow is the primary site of new blood cell production or hematopoiesis. It is composed of hematopoietic cells, marrow adipose tissue, and supportive stromal cells. In adult humans, bone marrow is primarily located in the ribs, vertebrae, sternum, and bones of the pelvis. On average, bone marrow constitutes 4% of the total body mass of humans; in an adult having 65 kilograms of mass (143 lb), bone marrow typically accounts for approximately . Human marrow
The White Bone the novel are mostly from the "She-S" family, into which Mud, a young cow who is pregnant with her first calf, has been adopted. Mud is blessed with visionary powers and can occasionally see into the future. Thrown into a drought, with human poachers becoming increasingly common, Mud and her family must find the legendary "Safe Place" where drought and poachers do not come. The "White Bone," a rib of a newborn elephant, is rumored to be lying somewhere in the savannah and is said to point in the direction of the Safe Place. After a slaughter which leaves most