Thoracic cage anatomy

this image shows the bones that form the thoracic cage from anterior view (the vertebrae , the ribs and the sternum)

showing:
1. thoracic vertebrae
2. manubrium of the sternum
3. body of the sternum
4. xiphoid process of the sternum
5. ribs
6. costal cartilages
7. true ribs (1--7)
8. false ribs (8--12)
9. vertebrocondral ribs (8--10) "the ribs reaches the cartilages"
10. floating ribs (11-12) "they don't have cartilages"