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Large Oxygen Short Explain Shape Red Blood Cell

The biconcave shape of red blood cells provides a large surface area to volume ratio for rapid oxygen diffusion and a short pathway for oxygen to reach all the hemoglobin within the cell.

The biconcave shape of red blood cells provides a large surface area to volume ratio for rapid oxygen diffusion and a short pathway for oxygen to reach all the hemoglobin within the cell.

Front Explain how the shape of a red blood cell allows it to take up a large amount of oxygen in a short time. ( 2 mark)
Back Large surface area to volume ratio; 
For diffusion; 
OR 
Flat/thin; 
So oxygen can reach all haemoglobin/centre rapidly / short pathway;

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