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Respiration is the process by which organisms produce energy from food. It requires oxygen and produces carbon dioxide as a waste product. Respiration occurs through two stages - external respiration which is breathing, and internal respiration which is cellular respiration where food is broken down. Aerobic respiration uses oxygen to break down glucose while anaerobic respiration occurs without oxygen, producing different waste products like alcohol or lactic acid.

Author

sriniram_2002

Language

EN