A Comparison of Mechanisms of Oxygen Transport Among Several Mammalian Species
One important function of the circulation is to provide oxygen to the peripheral tissues in quantities adequate for their metabolic needs. Since the final link in the chain of oxygen supply depends upon diffusion from capillary blood to the mitochondria, and since cellular oxygen tensions seem to be of the order of a few millimeters of mercury (Chance et al., 1962), the rate of oxygen diffusion is governed over short periods of time by the oxygen tension of capillary blood and the intercapillary diffusion distances (Krogh, 1941). Therefore, the first sentence of this paragraph could read that one important function of the circulation is to maintain an oxygen tension in tissue capillary blood adequate to supply tissue demands by diffusion.
KeywordsOxygen Tension Capillary Blood Blood Oxygen Mixed Venous Blood Blood Hemoglobin Concentration
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