Respiration may refer to:

In biology

• Cellular respiration, the process in which molecules are converted into useable energy.
• Anaerobic respiration, cellular respiration without oxygen
• Respiration (physiology), the transport of oxygen to cells where cellular respiration takes place
• Aquatic respiration, the process of animals extracting oxygen from water
• Carbon respiration, the transfer of molecular carbon to and from the atmosphere

See also

• Artificial respiration
• Respirator

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