*plse*the partial pressure of oxygen inside the lung (alveolar air) is usually kpa and the partial pressure of oxygen in the adjacent pulmonary blood is kpa.

Partial pressure (Px) is the pressure of a single type of gas in a mixture of gases. The partial pressure of oxygen inside the lung (alveolar air) is usually 13.86552829116 kPa (104 mm Hg) and the partial pressure of oxygen in the adjacent pulmonary blood is 13.3322387415 kPa (100 mm Hg).