Which of the following statements is true?
A. When the pressure in the lung is greater than inside the body, air flows from the body until the pulmonary and atmospheric pressures are equal.
B. When the pressure in the lung is greater than outside the body, air flows from the body until the pulmonary and atmospheric pressures are equal.
C. When the pressure in the lung is greater than outside the body, air flows into the body until the pulmonary and atmospheric pressures are equal.
D. When the pressure in the lung is less than outside the body, air flows from the body until the pulmonary and atmospheric pressures are equal.
Answer: D
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