Respiration may refer to: Biology Cellular respiration, the process in which nutrients are converted into useful energy in a cell Anaerobic respiration, cellular respiration without oxygen Maintenance respiration, the amount of cellular respiration required for an organism to maintain itself in a constant state Respiration (physiology), transporting oxygen and carbon dioxide between cells and the external environment Respiratory system, the anatomical system of an organism used for respiration Breathing, passing air in and out through respiratory organs Aquatic respiration, animals extracting oxygen from water Artificial respiration, the act of simulating respiration, which provides for the overall exchange of gases in the body by pulmonary ventilation, external respiration and internal respiration Cheyne–Stokes respiration, an abnormal pattern of breathing characterized by progressively deeper and sometimes faster breathing, followed by a gradual decrease that results in a temporary stop in breathing called an apnea Respiration, a journal by Karger Publishers Ecology Carbon respiration, a concept used in calculating carbon (as ) flux occurring in the atmosphere Ecosystem respiration, measurement of gross carbon dioxide production by all organisms in an ecosystem Root respiration, exchange of gases between plant roots and the atmosphere Photorespiration, enzymatic combination of RuBP with oxygen Entertainment "Respiration" (song), a 1999 single by Black Star "Respire" (song), a 2003 song by Mickey 3D Respire (film), a 2014 French drama film Respiration (album), a 2022 album by Cecil Taylor