| alveolar pressure |
Air pressure in the alveoli and bronchial tree. It fluctuates below and above atmospheric pressure during breathing; this causes air to enter or leave the lungs. SYN: intrapulmonic pressure .
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| alveolar socket |
The bony space occupied by the tooth and periodontal ligament.
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| alveolar vent |
An opening between adjacent alveoli of the lung.
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| alveolar-capillary block |
Impaired ability of gases to pass through the pulmonary alveolar-capillary membrane.
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| alveolar/arterial gradient |
ABBR: A/a gradient. The difference between the calculated oxygen pressure available in the alveolus and the arterial oxygen tension. It measures the efficiency of gas exchange.
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