The best replacement for respiration is ventilation.

The best alternatives to respiration are rated as following:

★★★★★	ventilation
★★★★	breathing
★★★★	photosynthesis
★★★	fermentation
★★	anaerobic respiration
★★	cellular respiration
★	transpiration
★	glycolysis
★	aerobic respiration
★	fermentation venn diagram
★	anaerobic
	aqua affinity
	photosynthesis chart
	photosynthesis lab
	inspiration
	photosynthesis venn diagram
	photosynthesis worksheet
	combustion
	photorespiration
	krebs cycle
	external respiration
	aerobic
	internal respiration
	aspiration

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Speaking about respiration, one probably shouldn't forget about oxygen.

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respiration

ventilation

breathing