functional residual air (capacity)

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• Functional residual capacity — (FRC) is the volume of air present in the lungs at the end of passive expiration. At FRC, the elastic recoil forces of the lungs and chest wall are equal but opposite and there is no exertion by the diaphragm or other respiratory muscles.FRC is… …   Wikipedia

• capacity — 1. The potential cubic contents of a cavity or receptacle. 2. Power to do. SEE ALSO: volume. [L. capax, able to contain; fr. capio, to take] buffer c. the amount of hydrogen ion (or hydroxyl ion) required to bring about a specific pH change in a… …   Medical dictionary

• air — 1. A mixture of odorless gases found in the atmosphere in the following approximate percentages by volume after water vapor has been removed: oxygen, 20.95; nitrogen, 78.08; argon 0.93; carbon dioxide, 0.03; other gases, 0.01. Formerly used to …   Medical dictionary

• Closing capacity — The closing capacity (CC) is the volume in the lungs at which its smallest airways, the alveoli collapse. The alveoli lack supporting cartilage and so depend on other factors to keep them open. The closing capacity is greater than the residual… …   Wikipedia

• inspiratory capacity — n the total amount of air that can be drawn into the lungs after normal expiration * * * the volume of gas that can be taken into the lungs on a full inhalation, starting from the functional residual capacity; it is equal to the tidal volume plus …   Medical dictionary

• Diffusion capacity — Diagnostics MeSH D011653 In biology, diffusion capacity is a measurement of the lung s ability to transfer gases. Oxygen uptake may be limited by diffusion in circumstances of low ambient oxygen or high pul …   Wikipedia

• Spirometry — TLC Total lung capacity: the volume in the lungs at maximal inflation RV Residual volume: the volume of air remaining in the lungs …   Wikipedia

• respiration, human — ▪ physiology Introduction       the process by which oxygen is taken up and carbon dioxide discharged. The design of the respiratory system  The human gas exchanging organ, the lung, is located in the thorax, where its delicate tissues are… …   Universalium

• Respiratory minute volume — TLC Total lung capacity: the volume in the lungs at maximal inflation RV Residual volume: the volume of air remaining in the lungs …   Wikipedia

• Liquid breathing — Intervention MeSH D021061 Liquid breathing is a form of respiration in which a normally air breathing organism breathes an oxygen rich liquid (such as a perfluorocarb …   Wikipedia

• Pulmonary contusion — Classification and external resources A CT scan showing a pulmonary contusion (red arrow) accompanied by a rib fracture (blue arrow) ICD 10 S …   Wikipedia