Which bone marrow stores fat and is normally located in the medullary cavity of long bones in adults?

Which bone marrow stores fat and is normally located in the medullary cavity of long bones in adults?

• A. Yellow bone marrow
• B. Red bone marrow
• C. Hematopoietic marrow
• D. Myeloid tissue

Answer: (A)

Fat storage in bone marrow is located in the medullary cavity of long bones in adults, and that tissue is called yellow bone marrow. It’s mostly made of adipocytes, serving as a fat reserve rather than a site of blood cell production. In contrast, red marrow is hematopoietic and produces blood cells, and in adults it’s found mainly in flat bones and the ends of long bones rather than the medullary cavity. As people age, red marrow is gradually replaced by yellow marrow in many long bones, though yellow marrow can convert back to red marrow if the body needs to increase blood cell production during severe anemia or trauma.

Fat storage in bone marrow is located in the medullary cavity of long bones in adults, and that tissue is called yellow bone marrow. It’s mostly made of adipocytes, serving as a fat reserve rather than a site of blood cell production. In contrast, red marrow is hematopoietic and produces blood cells, and in adults it’s found mainly in flat bones and the ends of long bones rather than the medullary cavity. As people age, red marrow is gradually replaced by yellow marrow in many long bones, though yellow marrow can convert back to red marrow if the body needs to increase blood cell production during severe anemia or trauma.