Question

what would you find in the marrow cavity of the diaphysis of an adult humerus (arm bone)?
periosteum
hematopoietic tissue
red bone marrow
yellow bone marrow
compact bone

Explanation:

In adults, the marrow cavity of the diaphysis of long - bones like the humerus contains yellow bone marrow. Yellow bone marrow is mainly composed of adipose tissue and is less active in hematopoiesis compared to red bone marrow which is more prominent in children. Hematopoietic tissue is mainly found in red bone marrow in certain locations in adults, not in the diaphysis marrow cavity. Periosteum is the outer covering of the bone, and compact bone is the dense outer layer of the bone structure.

Answer:

Yellow bone marrow