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4: Distribution of Ventilation

Pulmonary Physiology · LibreTexts

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    From LibreTexts, under CC BY-NC-SA 4.0, as the source states it; its equations are written in TeX, which the PDF shows typeset. This page at LibreTexts.

    Learning objectives
    • Describe the distribution of ventilation and how it is affected by gravity and lung volume.

    • 4.1: Radial Traction
      Taking a breath-in one might imagine that each part of the lung gets an equal share of the inspired air. But regions of the lung are not equally ventilated. The unequal distribution is caused by 1) gravity and 2) lung volume.
    • 4.2: Distribution of Ventilation Across the Lung
      The lung hangs in the thorax supported by the trachea and the surface tension adhering it’s outer surface to the inside of the thoracic cavity. Gravity obviously tends to pull the lung downward, and this pull has an unequal effect on alveoli at different heights of the lung.

    This page titled 4: Distribution of Ventilation was last modified on Wed, 13 Mar 2024 21:50:45 GMT and is shared under a CC BY-NC-SA 4.0 license and was authored, remixed, and/or curated by Andrew Binks (Virginia Tech Libraries' Open Education Initiative) .