Physical Therapy Technician Certification (PTTC) Practice Exam

Cancellous bone tissue, often referred to as trabecular or spongy bone, is characterized by its spongy appearance and the presence of numerous open spaces. This structure contributes to its lightweight nature and provides significant strength while minimizing the overall weight of the skeleton. The spaces within cancellous bone are filled with red or yellow bone marrow, which plays a crucial role in hematopoiesis (the formation of blood cells) and fat storage.

Cancellous bone is typically found at the ends of long bones, within the interior of other bones, and in areas where bones need to absorb shock or stress. Its unique architecture allows it to distribute forces across a wider area, which is vital during activities such as walking or running.