<P> The two types of bone marrow are `` red marrow '' ( Latin : medulla ossium rubra ) , which consists mainly of hematopoietic tissue , and `` yellow marrow '' ( Latin : medulla ossium flava ) , which is mainly made up of fat cells . Red blood cells , platelets , and most white blood cells arise in red marrow . Both types of bone marrow contain numerous blood vessels and capillaries . At birth , all bone marrows are red . With age , more and more of it is converted to the yellow type ; only around half of adult bone marrow is red . Red marrow is found mainly in the flat bones , such as the pelvis , sternum , cranium , ribs , vertebrae and scapulae , and in the cancellous ( `` spongy '' ) material at the epiphyseal ends of long bones such as the femur and humerus . Yellow marrow is found in the medullary cavity , the hollow interior of the middle portion of long bones . In cases of severe blood loss , the body can convert yellow marrow back to red marrow to increase blood cell production . </P>
<P> The two types of bone marrow are `` red marrow '' ( Latin : medulla ossium rubra ) , which consists mainly of hematopoietic tissue , and `` yellow marrow '' ( Latin : medulla ossium flava ) , which is mainly made up of fat cells . Red blood cells , platelets , and most white blood cells arise in red marrow . Both types of bone marrow contain numerous blood vessels and capillaries . At birth , all bone marrows are red . With age , more and more of it is converted to the yellow type ; only around half of adult bone marrow is red . Red marrow is found mainly in the flat bones , such as the pelvis , sternum , cranium , ribs , vertebrae and scapulae , and in the cancellous ( `` spongy '' ) material at the epiphyseal ends of long bones such as the femur and humerus . Yellow marrow is found in the medullary cavity , the hollow interior of the middle portion of long bones . In cases of severe blood loss , the body can convert yellow marrow back to red marrow to increase blood cell production . </P>
what part of the body is bone marrow taken from
what part of the body is bone marrow taken from
pelvis , sternum , cranium , ribs , vertebrae and scapulae
pelvis , sternum , cranium , ribs , vertebrae and scapulae