How many true ribs are there?

The correct answer is that there are 7 true ribs in the human body. True ribs are defined as the first seven pairs of ribs that are directly attached to the sternum via their own costal cartilages. This direct connection to the sternum is what differentiates true ribs from false ribs, which do not attach directly to the sternum. The configuration of these ribs enables more stability and support for the thoracic cavity and is crucial for protecting vital organs like the heart and lungs.

In contrast, while there are more ribs in total, with false ribs and floating ribs included, only the first seven pairs are classified as true ribs. This classification is vital to understand the anatomy of the rib cage and its functional relevance in respiratory mechanics and overall thoracic movement.