Question

why is capilliaries wall one cell thick​

Answer 1

Answer:

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↪↪Walls are one cell thick, this allows for the diffusion of substances into the cells from the capillaries and out of the cells into the capillaries.

Answer 2

Answer:

Capillaries. ... The walls of capillaries are just one cell thick. Capillaries therefore allow molecules to diffuse across the capillary walls. This exchange of molecules is not possible across the walls of other types of blood vessel because the walls are too thick.