Air pathway from the atmosphere to alveoli and gaseous exchange
Lesson 11 / 12
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I can describe the pathway of air from the atmosphere through to gaseous exchange in my lungs.
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Air enters through the mouth/nose, travels down the trachea and bronchi to the alveoli where gaseous exchange occurs.
Gaseous exchange is the process of diffusion where oxygen moves into the body and carbon dioxide moves out.
Diffusion is the movement of particles (e.g. oxygen) from an area of high to an area of low concentration.
Gaseous exchange increases during/immediately after exercise.
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