Exhaling, or breathing out, decreases the size of the chest, which increases air pressure inside the lungs.  Having read the above passage, choose the right answer to the following question (choices are higher or lower ):   A doctor was doing some lung tests on a patient and testing the air pressure inside the patient's lungs. She found that when the patient's chest got smaller while expelling air that the pressure in the patient's lungs got higher or lower?
higher