The O₂ partial pressure in the blood leaving a breathing organ is considered the best single measure of the breathing organ's effectiveness. Why is the partial pressure of blood going toward the breathing organ not an effective measure?

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The Answer of The O₂ partial pressure in the blood leaving a breathing organ is considered the best single measure of the breathing organ's effectiveness. Why is the partial pressure of blood going toward the breathing organ not an effective measure?

The O2 Partial Pressure in the Blood Leaving a Breathing

The O₂ Partial Pressure in the Blood Leaving a Breathing