Final answer:
Boyle's law explains the relationship between pressure and volume of a gas in the lungs during inhalation and exhalation.
Step-by-step explanation:
The relationship between pressure and volume of a gas, as described by Boyle's law, relates to the changes in lung pressure during inhalation and exhalation. When the volume of the lungs increases during inhalation, the pressure inside the lungs decreases, creating a lower pressure than the atmosphere. This difference in pressure allows air to flow into the lungs. Conversely, during exhalation, when the volume of the lungs decreases, the pressure inside the lungs increases, creating a higher pressure than the atmosphere, which expels air out of the lungs.