How many ribs are in the thorax, and how many of those are connected directly to the sternum?

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Multiple Choice

How many ribs are in the thorax, and how many of those are connected directly to the sternum?

Explanation:
The main idea is understanding how the ribs connect to the sternum. There are 12 pairs of ribs, making 24 individual ribs in the thorax. The first seven pairs are true ribs and attach directly to the sternum via costal cartilage. Ribs 8 through 10 are false ribs: they don’t attach directly to the sternum but connect to the cartilage of the rib above, forming an indirect link to the sternum. Ribs 11 and 12 are floating ribs and do not attach to the sternum at all. So, seven ribs attach directly to the sternum, not ten, eight, or twelve.

The main idea is understanding how the ribs connect to the sternum. There are 12 pairs of ribs, making 24 individual ribs in the thorax. The first seven pairs are true ribs and attach directly to the sternum via costal cartilage. Ribs 8 through 10 are false ribs: they don’t attach directly to the sternum but connect to the cartilage of the rib above, forming an indirect link to the sternum. Ribs 11 and 12 are floating ribs and do not attach to the sternum at all. So, seven ribs attach directly to the sternum, not ten, eight, or twelve.

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