DIFFUSION: Net Movement of Particles Down the Concentration Gradient (High Concentration to Low Concentration)
ROLE OF DIFFUSION IN GAS EXCHANGE
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In Alveoli
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EXPLANATION
During Inhalation, Oxygen Enters Alveoli
High Concentration of Oxygen in Alveoli, Low Concentration of Oxygen in Blood Capillaries
Oxygen will Diffuse out of Alveoli Down the Concentration Gradient Into Blood Capillaries
Oppositely, There is High Concentration of Carbon Dioxide in Blood Capillaries (from Waste of Respiration) and Low Concentration of Carbon Dioxide in Alveoli
Carbon Dioxide will Diffuse out of Blood Capillaries Down the Concentration Gradient into Alveoli
This is how Net Exchange of Gases Take Place
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