According to the sources, humans have 12 pairs of ribs. The first seven pairs are true ribs, the 8th, 9th, and 10th are false ribs, and the last 2 pairs (11th and 12th) are not connected ventrally, making them floating ribs . Other options are incorrect because: (1) Humans have only one pair of collar bones (clavicles), with one in each half of the pectoral girdle ; (2) There are three pairs of salivary glands in humans; and (3) Humans possess 12 pairs of cranial nerves, while the sources mention 10 pairs specifically for frogs .