The partial pressure of oxygen in the alveoli of the lungs is:

The partial pressure of oxygen ($p{O}_2$) in the alveoli is about $104\text{mm Hg}$, whereas in the deoxygenated blood in pulmonary capillaries it is $40\text{mm Hg}$ and in oxygenated blood it is $95\text{mm Hg}$. Thus, it is more than that in the blood.