1. In an adult, most red blood cells are formed in flat bones . 2. Like the other cranial bones it is classed as a flat bone . 3. The Fell pony should be hardy and show good pony characteristics, including strong flat bone . 4. Less commonly affected sites include the talus and calcaneus of the foot and flat bones . 5. Dog biscuits may be sold in a flat bone -shape. 6. Other skeletal signs include enlarged joints, short hands and fingers, and flat bones of the spine ( vertebrae ). 7. Secondary ossification occurs after birth, and forms the epiphyses of long bones and the extremities of irregular and flat bones . 8. A third type of bone cell found in flat bones is called an osteoclast, which destroys the bone using enzymes. 9. If you applied a bit of pressure to a flat bone such as the pelvic bone, you could bend it. 10. In humans, it is a flat bone , roughly triangular in shape, placed on a posterolateral aspect of the thoracic cage.