(Solved): The Fick Principle (not to be confused with Fick's Law of Diffusion or the Krogh Principle) states ...

The Fick Principle (not to be confused with Fick's Law of Diffusion or the Krogh Principle) states that you could actually measure an animal's rate of oxygen consumption \( \left(V_{\mathrm{O}_{2}}\right) \) by measuring cardiac output and the difference in \( \mathrm{O}_{2} \) content between arterial blood and venous blood. In other words, if you measured cardiac output and took blood samples from an (1) animal's artery and (2) a vein, and measured the \( \mathrm{O}_{2} \) content in each sample, you could calculate the rate of \( \mathrm{O}_{2} \) consumption. The equation itself looks like this: \( V_{\mathrm{O}_{2}}=C O\left(C_{a_{O_{2}}}-C_{v_{O_{2}}}\right) \), where CO is cardiac output, \( C_{a_{O_{2}}} \) is the oxygen content of arterial blood, and \( \mathrm{C}_{\mathrm{VO}_{2}} \) is the oxygen content of venous blood. We've argued that \( V_{\mathrm{O}_{2}} \) represents not just the rate of \( \mathrm{O}_{2} \) consumption, but because that \( \mathrm{O}_{2} \) must have been delivered to be consumed, it also represents the rate of \( \mathrm{O}_{2} \) delivery. Based on this argument about \( \mathrm{V}_{2} \), and that superficial description of the Fick Principle, why would diving bradycardia \( \ldots \) a reduction in heart rate while diving - allow an animal to conserve oxygen stores while the animal is apneic?