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11 May, 09:44

Which of the following terms best relates to the mechanisn that flatworms use to obtain oxygen pharynx diffusion spiracles excretion

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  1. 11 May, 13:41
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    Flatworms absorb oxygen by diffusion mechanism through their skin to the cells in their bodies. Since flatworms do not have a circulatory system, their bodies' cells are positioned close to the skin to ease the uptake of oxygen from surrounding fluids or water.
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