Why is oxygen not transported by diffusion in large sized animal?
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because diffusion is a very slow process.. so if we have diffusion like process then a single molecule of o2 takes more than 2 years
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Diffusion is the movement of materials from a higher to a lower concentration. ... Oxygen concentration in cells is low (when leaving the lungs blood is 97% saturated with oxygen), so oxygen diffuses from the blood to the cells when it reaches the capillaries. Effectiveness of various oxygen carrying molecules.
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