What are the first seven ribs called?

The first seven ribs are known as true ribs, which are directly attached to the sternum via costal cartilage. This anatomical feature is significant because it allows for greater stability and force distribution during breathing and upper body movements. True ribs, which are numbered from one to seven, provide a structural connection between the ribcage and the front of the body, aiding in the protection of vital organs such as the heart and lungs.

The classification of ribs is important in understanding their function and connectivity in the thoracic skeleton. While false ribs (the eighth through twelfth ribs) do connect to the sternum indirectly or not at all, true ribs provide a solid and direct connection, highlighting their importance in maintaining the integrity of the thoracic cavity. Floating ribs, a subset of false ribs, do not attach to the sternum at all, further distinguishing the functional roles of different rib categories in the body. Accessory ribs are not commonly recognized in standard anatomical terminology and do not pertain to this classification.