<span><span>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 </span>13.86552829116 kPa (104 mm Hg) and the partial pressure of oxygen in the adjacent pulmonary blood is 13.3322387415 kPa (100 mm Hg)<span>. </span></span>
