The lungs expand, causing their internal pressure to decrease.
Explanation:
Inhalation is one of the two mechanisms of breathing when air or oxygen is taken in.
During the process of inhalation or inspiration when air is inhaled following changes occur:
Diaphragm gets contracted and pulls to downward attaining convex shape and the muscles in between rib ( intercostal muscles) get contracted and gets upward pull attaining the concave shape.
This contraction causes the lungs to expand and the air pressure with in gets decreased in comparison to atmospheric pressure. This results in inhalation of air into the lungs.
The process of inspiration involves the lungs expanding , causing the
internal pressure to decrease.
Inspiration involves the process in which oxygen is inhaled and taken into
the body through the nostrils. This process brings about the rib cage
being expanded which also affects the lungs.
The lungs which have been expanded brings about a decrease in the
internal pressure as a result of it exerting a lesser force on the internal
system as a result of the oxygen present in it.
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