During inhalation,air flows into the lungs because:
A)air pressure is greater outside the body than in the lungs and naturally flows inside once the chest has expanded
B)the strong chest muscles are sucking in air
C)air moves passively in and out of the lungs through time
D)the surfactant in the lungs "draws" in air because of its adhesive properties

Question

Quizplus · Accepted Answer

During inhalation, the diaphragm and intercostal muscles contract, causing the volume of the chest cavity to increase. This decrease in pressure within the lungs draws air in from the outside, where the air pressure is higher. This is known as negative pressure breathing.

During Inhalation,air Flows into the Lungs Because