Question

in the long bone, what is the order of materials of the diaphysis that you would encounter as you moved from the outside of the bone to inside the bone? periosteum - compact bone - yellow bone marrow compact bone - periosteum - endosteum spongy bone - periosteum - compact bone. endosteum - spongy bones - periosteum.

Explanation:

To determine the correct order, we recall the structure of a long bone's diaphysis. The outermost layer is the periosteum, followed by compact bone (cortical bone), and then the medullary cavity containing yellow bone marrow (in adults). Let's analyze each option:

• Option 1: periosteum (outermost) → compact bone → yellow bone marrow (inside medullary cavity) matches the structure.
• Option 2: Compact bone is not outside the periosteum, so this is incorrect.
• Option 3: Spongy bone is not the outermost, and the order is reversed, so incorrect.
• Option 4: The order here is completely reversed from the actual structure.

Answer:

A. periosteum - compact bone - yellow bone marrow