Final answer:
The first seven rib pairs are referred to as 'true ribs.' They connect directly to the sternum via costal cartilage, differing from false and floating ribs, which have indirect or no sternal attachment.
Step-by-step explanation:
True Ribs:
The medical term used to refer to the first seven rib pairs is true ribs. These ribs are designated as numbers 1-7 and each rib in this group connects directly to the sternum via their own individual strips of costal cartilage, creating a firm attachment. In the thoracic cage, which also includes the thoracic vertebrae and the sternum, these true ribs play an essential role in protecting vital organs such as the heart and lungs.
Contrasting to the true ribs, the 8th to 10th pairs are known as false ribs as they connect indirectly to the sternum through the cartilage of the rib above, and the 11th and 12th pairs are referred to as floating ribs because they do not attach to the sternum at all. The costal cartilage from each of these ribs attaches directly to the sternum. Ribs 8-12 are known as false ribs or vertebrochondral ribs. The costal cartilages from these ribs do not attach directly to the sternum. Ribs 11-12, the last two false ribs, are also referred to as floating ribs or vertebral ribs.The true ribs are an important part of the rib cage that provides structural support and facilitates the respiratory function.