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when we breathe there is an exchange of oxygen for carbon dioxide . Please explain how...

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Medical Sciences

when we breathe there is an exchange of oxygen for carbondioxide . Please explain how does diffusion work at the level ofthe alveoli and then explain how is drowning and pulmonary edemaaffect diffusion and how are they the same?

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Respiratory system The exchange of gases between the alveoli and the blood capillaries occur through diffusion What is diffusion It is a process driven by the difference in the concentration gradient Simple diffusion takes place at the alveoli level Gas molecules move from higher gradient to lower gradient without any ATP expenditure During inspiration our lungs gets filled with the air and the oxygen content in it is more than the blood capillaries This can be explained by the partial pressure Partial    See Answer
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