Monday 21 November 2011

7.3 Gaseous Exchange across the Respiratory Surfaces

Able to explain in detail the process of gaseous exchange at alveolus



-       The partial pressure of oxygen in the air of alveoli is higher compared to the partial pressure of oxygen in the blood capillaries

-       Therefore, oxygen diffuses across the surface of the alveolus and blood capillaries.

-       Then oxygen will combine with haemoglobin to form oxyhaemoglobin 

-       Lastly this form will be transported to all parts of the body.

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