Which of the following are explanations for the left hemidiaphragmatic surface being slightly lower than the right?
I.The heart rests on the left half of the diaphragm, pushing it downward.
II.The presence of air in the stomach acts as a vacuum, pulling the diaphragm downward.
III.The liver, directly below the right half of the diaphragm, props up this area.

Question

Quizplus · Accepted Answer

The left diaphragmatic surface is slightly lower than the right because 
(1) the heart rests on the left half of the diaphragm, pushing it downward, and 
(2) the liver, directly below the right half of the diaphragm, props up this area (see Figure 2-1).

Which of the Following Are Explanations for the Left Hemidiaphragmatic