Bone marrow is found in cancellous bone. Which term best describes cancellous bone?

Bone marrow is found in cancellous bone. Which term best describes cancellous bone?

• A. Outer Bone
• B. Haversian Bone
• C. Compact Bone
• D. Cancellous Bone

Answer: (D)

Cancellous bone, also known as spongy bone, is the porous interior form of bone that looks lattice-like due to its trabeculae. These spaces are where bone marrow resides, making cancellous bone lighter but highly organized to support hematopoiesis and metabolic exchange. This tissue sits inside bones (such as the ends of long bones and inside vertebrae) and contrasts with compact bone, which is the dense outer layer arranged into tightly packed osteons with Haversian canals. So the term that best describes cancellous bone is cancellous bone itself—the spongy, porous type that houses marrow. The other options refer to dense, outer bone structures or to compact bone anatomy, not to this spongy interior.

Cancellous bone, also known as spongy bone, is the porous interior form of bone that looks lattice-like due to its trabeculae. These spaces are where bone marrow resides, making cancellous bone lighter but highly organized to support hematopoiesis and metabolic exchange. This tissue sits inside bones (such as the ends of long bones and inside vertebrae) and contrasts with compact bone, which is the dense outer layer arranged into tightly packed osteons with Haversian canals. So the term that best describes cancellous bone is cancellous bone itself—the spongy, porous type that houses marrow. The other options refer to dense, outer bone structures or to compact bone anatomy, not to this spongy interior.