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. 2010 Nov 26;213(24):4125–4136. doi: 10.1242/jeb.048181

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Fig. 3. — Schematic illustration of blood O₂ transport. (A) O₂-equilibrium curve under physiochemical conditions prevailing in arterial blood (a, solid curve, open symbol) and venous blood (v, dashed curve, closed symbol). The x-axis measures blood P_O₂ and the y-axis measures blood O₂ content. Ca_O₂–Cv_O₂ denotes the arterial–venous difference in O₂ content, Pa_O₂–Pv_O₂, denotes the corresponding difference in P_O₂, βb_O₂ denotes the blood O₂ capacitance coefficient (see text for details), denotes cardiac output, and denotes the rate of O₂ consumption. (B) The area of the rectangle is proportional to total O₂ consumption, which can be enhanced by increasing and/or by increasing the βb_O₂. Increases in the βb_O₂ produce a corresponding increase in Ca_O₂–Cv_O₂ through shifts in the shape or position of the O₂-equilibrium curve.

Inline graphic — Schematic illustration of blood O₂ transport. (A) O₂-equilibrium curve under physiochemical conditions prevailing in arterial blood (a, solid curve, open symbol) and venous blood (v, dashed curve, closed symbol). The x-axis measures blood P_O₂ and the y-axis measures blood O₂ content. Ca_O₂–Cv_O₂ denotes the arterial–venous difference in O₂ content, Pa_O₂–Pv_O₂, denotes the corresponding difference in P_O₂, βb_O₂ denotes the blood O₂ capacitance coefficient (see text for details), denotes cardiac output, and denotes the rate of O₂ consumption. (B) The area of the rectangle is proportional to total O₂ consumption, which can be enhanced by increasing and/or by increasing the βb_O₂. Increases in the βb_O₂ produce a corresponding increase in Ca_O₂–Cv_O₂ through shifts in the shape or position of the O₂-equilibrium curve.