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26-07-2022
Biology

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The primary force responsible for air moving into the lungs during inhalation is _________________.

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28-07-2022

The primary force responsible for air moving into the lungs during inhalation is atmospheric pressure.

What happens during inhalation?

Breathing or ventilation is the process of exchange of the gases between the lungs and the environment.
This involves moving of air into (inhalation) and out (exhalation) from the lungs to bring in oxygen and flush out carbon dioxide respectively.
This movement of air is due to pressure gradients (between the atmosphere and lungs) produced by the contraction of muscles of the diaphragm and thoracic cavity.
Inspiration (inhalation) is the process of taking air into the lungs. This is an active process as it involves contraction of muscles.
During inhalation, the diaphragm contracts due to which volume of thoracic cavity increases. This results in the decrease of intraalveolar pressure (inside lungs) as compared to atmospheric pressure. This creates a pressure gradient resulting in air flowing into the lungs.
During exhalation, the diaphragm relaxes and air moves out of the lungs.

Learn more about exhalation here:

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