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The primary driving force for oxygen diffusion in the lungs is the partial pressure gradient between alveolar air and blood.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
Oxygen moves from alveoli into the blood through diffusion, driven by the partial pressure gradient.
Ref: NCERT Class 11 Biology Chapter 14: Breathing and Exchange of Gases Exchange of Gases and Transport of Oxygen
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