Humans typically have 24 ribs, arranged in 12 pairs. These ribs form the rib cage, which protects vital organs such as the heart and lungs
. The ribs are classified into three types:
- True ribs (1–7): These ribs attach directly to the sternum via costal cartilage.
- False ribs (8–10): These ribs connect to the sternum indirectly by joining the cartilage of the rib above.
- Floating ribs (11–12): These ribs do not connect to the sternum at all and are only attached to the vertebrae at the back
There is no difference in the number of ribs between males and females, despite common myths originating from biblical stories
. Some individuals may have variations such as extra ribs (supernumerary ribs), including cervical ribs, or fewer ribs due to genetic anomalies, but these are rare
. In summary, the standard human rib count is:
- 12 pairs (24 ribs) total
- 7 pairs of true ribs
- 3 pairs of false ribs
- 2 pairs of floating ribs
This anatomical structure supports and protects the thoracic organs while allowing flexibility for breathing
