Final answer:
Yellow marrow, located in the medullary cavity of long bones, is primarily involved in fat storage. It contains adipose tissue, which can provide energy when needed, and replaces red bone marrow as a person ages.
Step-by-step explanation:
The area where yellow marrow is located is the medullary cavity of long bones, such as the femur. Yellow marrow consists primarily of adipose tissue and serves as a site for fat storage. As a person ages, the amount of yellow marrow increases as red bone marrow, which is responsible for hematopoiesis or the production of blood cells, is gradually replaced.
Yellow marrow can be found in the central portion of long bones, surrounded by the hard outer layer of bone. It contains adipocytes with triglycerides that can serve as a source of energy when needed. Therefore, while red marrow is the site for the production of red blood cells, white blood cells, and platelets, yellow marrow primarily functions as energy storage.