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Explain why flatworms do not need a respiratory or circulatory system
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Explain why flatworms do not need a respiratory or circulatory system
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May 4, 2018
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Explain why flatworms do not need a respiratory or circulatory system
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Because Oxygen and CO2 are transported into and out of individual cells by simple diffusion.
Pedram Behroozi
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May 10, 2018
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Pedram Behroozi
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