Certified Tissue Bank Specialist (CTBS) Practice Test 2026 - Free CTBS Practice Questions and Study Guide

Cancellous bone, commonly referred to as trabecular bone, is characterized by its porous, spongy structure that consists of a network of interconnecting trabeculae. This type of bone is found primarily at the ends of long bones, in the interior of others, and in the vertebrae. Its porosity allows for the accommodation of bone marrow and the storage of hematopoietic cells, which are essential for blood cell production.

The porous nature of cancellous bone provides several benefits, including lighter weight compared to denser cortical bone and an increased surface area for metabolic activity. The openness of this structure allows for the distribution of stress and contributes to the overall strength of the skeletal system while also making it more capable of housing marrow and facilitating various physiological functions.

In contrast, cortical bone is dense and robust, forming the outer layer of bones and primarily providing strength and support. The terms osteoinductive and marrow refer to different properties and functions within the context of bone biology rather than describing a type of bone structure. Thus, the description of bone that is more porous and deep directly aligns with the characteristics of cancellous bone.