1. The thin layer of cartilage on the end of bones where they form joints is called the
2. The hollow area in the shaft of long bones
where marrow is located is called the
3. The needle-like threads of spongy bone are
called
4. The structural units of compact bone are called
either osteons or
5. Osteocytes and chondrocytes live in small
spaces in the matrix called
6. Bone-resorbing cells are called