Explanation

Partial pressure of respiratory gases in-mm Hg [table] Respir atory gases | Inspired air on atmos pheric air | Alveolar air | Deoxy genated blood | Oxyge nated blood | Expired air | Tissue cells ; $\rho O_{2}$ $\rho CO_{2}$ | 158 0.3 | 100 40 | 40 45 | 95 40 | 116 32 | 40 45 [/table]