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NREMT EMT

Category - Trauma

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How many pairs of ribs do humans have?

Explanation

Answer: D - Humans have 12 pairs of ribs. Pairs 1-7 are attached anteriorly directly to the sternum; pairs 8, 9 and 10 attach to the upper ribs via the costal cartilage, while pairs 11 and 12 are known as floating ribs and are anchored only in back. The ribs not only protect the thoracic cavity, but also form the attachments for blood vessels and nerve bundles that tend to run underneath the ribs.

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