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Respiration 3April

Respiration 3April - Respiration(Chap 44 Respiration The...

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1 Respiration (Chap. 44) Respiration – The exchange of gases between an organism and its environment Cellular respiration: Fuel + O 2 CO 2 + ENERGY Organismic respiration: O 2 in: CO 2 out DIFFUSION can accommodate the metabolic needs of very small animals Amoeba Hydra Single cell Two cell layers Diffusion Diffusion
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