What differentiates cortical bone from trabecular bone?

• A. Cortical bone is located on the inside of bone, while trabecular bone is found on bone surface.
• B. Trabecular bone is softer because it is filled with marrow (like a sponge), while cortical bone is more solid.
• C. Cortical bone has less space within the bone, where trabecular bone is filled with small non-bony spaces.
• D. Trabecular bone is denser and adds to the strength of the inside of bones, while cortical bone is a thin layer that adds little strength to the bone.

Answer: (C)

Verified step by step guidance

1. Understand the two types of bone tissue: cortical bone and trabecular bone. Cortical bone is also known as compact bone, while trabecular bone is referred to as spongy bone.
2. Cortical bone is the dense, outer layer of bone that provides structural support and protection. It has fewer spaces within its structure, making it more solid and compact.
3. Trabecular bone, on the other hand, is found inside the bone and has a porous, sponge-like structure. It is filled with marrow and small spaces, which contribute to its lighter and less dense nature.
4. Recognize the functional differences: cortical bone primarily provides strength and rigidity to the bone's exterior, while trabecular bone contributes to the bone's ability to absorb shock and distribute mechanical loads.
5. Clarify the misconception: trabecular bone is not denser than cortical bone. Instead, cortical bone is denser and stronger, while trabecular bone is lighter and more flexible due to its porous structure.