Abstract
The prime function of the lungs is to accomplish efficient gas exchange between the blood flow through the pulmonary capillaries and the air ventilating their relating alveoli. Normally this process occurs over an enormous cardiac output range from 5 litres per minute at rest to perhaps thirty litres per minute in extreme exercise . Yet the lung capillary blood volume probably never exceeds 200 millilitres (Roughton & Forster 1957) and blood flow is accomplished in such a manner that the intravascular pressures within the capillaries rarely exceed the plasma osmotic filtration pressure, so that the Starling relation between the vascular and extra vascular compartments of the lungs is maintained and pulmonary oedema is avoided.
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References
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de J. Lee, G. (1980). The Role of the Pulmonary Venous System in Regulation of Lung Capillary Blood Flow and Tissue Exchange. In: Cumming, G., Bonsignore, G. (eds) Pulmonary Circulation in Health and Disease. Ettore Majorana International Science Series, vol 3. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-1721-1_21
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DOI: https://doi.org/10.1007/978-1-4757-1721-1_21
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