Question

How are capillaries adapted to increase diffusion rate?

Accepted Answer

They have permeable walls, so substances being exchanged with the cells can diffuse in and out
Their walls are one cell thick which increases the rate of diffusion by decreasing the distance over which it occurs
Very narrow, which gives them a large surface area compared to their volume, which increases the rate of diffusion.

Front	How are capillaries adapted to increase diffusion rate?
Back	They have permeable walls, so substances being exchanged with the cells can diffuse in and out Their walls are one cell thick which increases the rate of diffusion by decreasing the distance over which it occurs Very narrow, which gives them a large surface area compared to their volume, which increases the rate of diffusion.

Diffusion Increases Rate Capillaries Adapted Permeable Walls Substances