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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