Hello, what you think is bone marrow in the bones you usually eat is actually fat. Bone marrow is a spongy tissue between the bone marrow cavity of long bones (such as humerus and femur) and the loose bone of flat bones (such as ilium). The bone marrow that can produce blood cells is slightly red and is called red bone marrow. Bone marrow is a very important part of animal organs, and hematopoietic stem cells are supplied by bone marrow. As the saying goes, bone marrow enriches blood, which not only tastes good, but also has good nutritional value. In the future, it is best to eat bone marrow. In particular, the soup that turns white after bone marrow is transformed into soup is the most nutritious and fragrant.