On Alderaan, the aliens have a hemoglobin-like molecule in t…

On Alderaan, the aliens have a hemoglobin-like molecule in their blood that is fully saturated when bound to TEN O2 molecules. If the sO2 of the aliens’ venous blood is normally 40%, how many O2 molecules does each hemoglobin molecule give up during a single pass through their systemic circuit?