Why is the left lung narrower than the right lung?
a. Liver compresses the left lung.
b. Mediastinal organs push laterally into the left hemithorax.
c. There is poorer blood flow during fetal development.
d. There is upward pressure of the abdominal contents.
ANS: B
The organs within the mediastinum bulge into the left hemithorax, resulting in a narrower and slightly smaller left lung.
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