Respiration

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Respiration may refer to:

• Respiration (physiology) and Breathing, the physiological process that enables animals to exchange carbon dioxide, the primary product of cellular respiration, for fresh air.
• Cellular respiration, the process in which nutrients are converted into useful energy in a cell
• Anaerobic respiration, cellular respiration without oxygen
• Aquatic respiration, the process of animals extracting oxygen from water
• Carbon respiration, a concept used in calculating carbon (as CO₂) flux occurring in the atmosphere
• Ecosystem respiration, measure of gross carbon dioxide production by all organisms in an ecosystem
• Root respiration, exchange of gases between plant roots and the atmosphere
• "Respiration" (song), a 1999 hip hop group single by Black Star

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