Why Does the Surface of the Lungs Need to Be

Multiple Choice

Why does the surface of the lungs need to be covered with pleura?

A) to allow the exchange of oxygen within the alveoli
B) to allow the exchange of carbon dioxide within the alveoli
C) to produce the muscular contractions that expand the lungs
D) to enable the lungs to slide past the internal chest wall and diaphragm
E) to prevent the alveoli from collapsing due to pressure