Which of the following statements best describes the function of red marrow?

The function of red marrow is primarily to store and produce blood cells, making this the most accurate and comprehensive description of its role within the body. Red marrow, which is found in certain bones such as the pelvis, ribs, and sternum, is responsible for hematopoiesis, the process of creating new blood cells. This includes red blood cells, which carry oxygen, white blood cells, which are crucial for the immune response, and platelets, which are essential for blood clotting.

While some marrow can store fat, particularly yellow marrow, the specific function of red marrow is centered around the active formation and storage of various blood cells. This characteristic distinguishes it from other types of marrow and makes it critical to the body's ability to maintain its blood supply and immune function. Moreover, it does not primarily filter blood, nor does it produce hormones; these functions are associated with other organs, such as the spleen and endocrine glands.