Inhalation and exhalation are key processes in breathing involving the diaphragm and intercostal muscles. Alveoli facilitate gas exchange in the respiratory system.
Inhalation is an active process that mainly involves the contraction of the diaphragm and the external intercostal muscles. During inhalation, the thoracic volume increases, causing air pressure inside the lungs to decrease, leading to air entering the respiratory system.
Exhalation, on the other hand, is typically a passive process driven by the elasticity of the lungs as the diaphragm relaxes, resulting in air being pushed out of the lungs. The thoracic cavity expansion and the lowered air pressure inside the lungs are key mechanisms in the inhalation and exhalation processes.
The alveoli play a vital role in the respiratory system as the sites where oxygen and carbon dioxide exchange occurs. They are essential for efficient gas exchange during the ventilation process.
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