alveolar pressure

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alveolar pressure

Air pressure in the alveoli and bronchial tree. When this pressure is positive, it is higher than atmospheric pressure; when negative, less. Gases flow from higher to lower pressures: when alveolar pressures are higher than atmospheric pressure, respiratory gases tend to be exhaled. When alveolar pressures are less than atmospheric pressures, gas flows into the lungs. Synonym: intrapulmonic pressure
See also: pressure
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