Definition of Respiratory Cycle

respiratory cycleRespiratory Cycle is one repetition of the pattern of inhalation (breathing air into the lungs), oxygen-carbon dioxide exchange, and exhalation (breathing air out of the lungs).

In health a typical adult completes 15 to 20 respiratory cycles a minute, called the respiration rate. The brainstem regulates the respiratory cycle in response to feedback mechanisms from other body systems that indicate oxygen needs and consumption.

See also AEROBIC FITNESSBREATHING EXERCISESDYSPNEAHYPERVENTILATIONTACHYPNEA.

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