Capillaries are narrow to provide a large surface area relative to their volume, which increases the rate of diffusion.
Les capillaires sont étroits pour maximiser leur surface par rapport à leur volume, ce qui augmente le taux de diffusion.
| Front | Why are capillaries narrow? |
|---|---|
| Back | This gives them a large surface area compared to their volume, which also increases the rate of diffusion. |
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