Structure of bone. Illustration showing a section of human spine with five adjacent vertebrae, surrounded by an illustration of the microscopic structure of cancellous (spongy) bone tissue. Cancellous bone is found in the interior of bones such as the vertebrae, and the ends of the long bones. It is characterised by a honeycomb arrangement, comprising a network of trabeculae; a latticework of bone tissue. These structures provide support and strength to the bone. The spaces within this tissue contain bone marrow.