Cancellous bone is also known as what type of bone?

• A. Cortical bone
• B. Trabecular bone
• C. Compact bone
• D. Medullary bone

Answer: (B)

Cancellous bone is more commonly known as trabecular bone. This type of bone is characterized by its porous and sponge-like structure, which provides strength and support while also being lightweight. Trabecular bone is found predominantly at the ends of long bones, within the interior of the vertebrae, and in the pelvic bones, where it plays a crucial role in the body's structural integrity and in the storage of bone marrow.

The term "cancellous" comes from the Latin word for "lattice," which accurately describes the open or lattice-like appearance of this type of bone. Trabecular bone is important for the production of blood cells, and its trabeculae (the tiny struts and plates that make up the structure of the bone) contain red marrow. Given its unique properties, trabecular bone has different mechanical and metabolic functions compared to other types of bone.

In contrast, cortical bone, also referred to as compact bone, is dense and forms the outer layer of bones, providing strength and protection. Medullary bone is associated with the bone marrow cavity, which can have functions related to fat and hormone storage. Therefore, trabecular bone is the term that accurately corresponds to cancellous bone, as it reflects