Inferior extent of the lung posteriorly corresponds to which rib?

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Multiple Choice

Inferior extent of the lung posteriorly corresponds to which rib?

Explanation:
The lower edge of the lung on the back sits at about the 10th rib. This reflects how the diaphragms slope upward toward the back and how the lung border descends with the diaphragm as you look posteriorly. So, the inferior posterior extent of the lung corresponds to the 10th rib. The 8th or 9th would be too high on the back, and the 11th or 12th would be below the lung margin, venturing into pleura or abdomen.

The lower edge of the lung on the back sits at about the 10th rib. This reflects how the diaphragms slope upward toward the back and how the lung border descends with the diaphragm as you look posteriorly. So, the inferior posterior extent of the lung corresponds to the 10th rib. The 8th or 9th would be too high on the back, and the 11th or 12th would be below the lung margin, venturing into pleura or abdomen.

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