Which bone tissue provides the dense outer layer and strength?

Which bone tissue provides the dense outer layer and strength?

• A. Compact Bone
• B. Spongy Bone
• C. Bone Marrow
• D. Medullary Cavity

Answer: (A)

Compact bone provides the dense outer shell of a bone and the strength to bear loads. Its highly organized structure, with tightly packed osteons and concentric lamellae around a central canal, makes it stiff and resistant to bending and compression, forming the sturdy exterior that protects the inner tissues. Spongy bone, by contrast, is lighter and consists of a lattice of trabeculae inside the bone, which helps reduce weight and houses bone marrow. Bone marrow is the tissue within the marrow cavities responsible for blood cell formation, while the medullary cavity is the hollow space inside long bones that contains marrow and fat; neither is the dense outer layer that provides strength.

Compact bone provides the dense outer shell of a bone and the strength to bear loads. Its highly organized structure, with tightly packed osteons and concentric lamellae around a central canal, makes it stiff and resistant to bending and compression, forming the sturdy exterior that protects the inner tissues. Spongy bone, by contrast, is lighter and consists of a lattice of trabeculae inside the bone, which helps reduce weight and houses bone marrow. Bone marrow is the tissue within the marrow cavities responsible for blood cell formation, while the medullary cavity is the hollow space inside long bones that contains marrow and fat; neither is the dense outer layer that provides strength.