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Diffusion Narrow Capillaries Adapted Slow Blood Flow Time

Front How are capillaries adapted for diffusion? (5)
Back - slow blood flow
- more time for diffusion

- numerous and highly branched
- larger surface area for diffusion

- one cell thick endothelium
- narrow diameter so permeate tissues
- narrow lumen, RBCs pressed against walls
- shorter diffusion pathway

Tags: blood, gas_exchange

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