Biology
Biology, 28.07.2019 14:30, franky2871

Aflatworm obtains oxygen needed for cellular respiration through simple diffusion. a human obtains oxygen by breathing it in from the air and into the lungs. which system is the flatworm missing? question 7 options: a digestive system a nervous system a respiratory system

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Aflatworm obtains oxygen needed for cellular respiration through simple diffusion. a human obtains o...

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