Respuesta :
The essential roles including barrier protection, fluid balance, the release of particulate, initiation of immune responses, mucus and surfactant exhibit, and repair following injury.
What is respiration?
Inhalation:
On inhalation, the pressure in the alveoli is high, hence the Oxygen diffuses to the nearby blood through the membrane.
Exhalation:
It is the process in which a person releases the air collected in the lung. During exhalation, the pressure in the alveoli is low, hence the carbon dioxide present in the blood is diffused out into the alveoli.
Therefore, the expandable structure of alveoli helps the respiratory system to follow its function.
To know more about the Respiratory system,
brainly.com/question/19879545
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