How does CO2 gets diffused into the red blood cells? > Carbon dioxide diffuses out of the tissues and into the blood, where it is dissolved in the plasma. While some of the carbon dioxide remains dissolved in the plasma, most carbon dioxide diffuses into our red blood cells. In the red blood cell, some carbon dioxide binds to hemoglobin, forming what we call carbaminohemoglobin. Do any other gases also diffuse into the red blood cells, if no why does only CO2 gets into the RBCs ?

The red cell membrane is highly permeable to gases because the molecules of gases are small, uncharged, and soluble in lipids, such as those of a bilayer.The effect of 4,4′-diisothiocyanato-stilbene-2,2′-disulfonate on CO2 permeability of the red blood cell membrane Remember red blood cells are cells like any other cells only that they have hemoglobin and no nucleus. Because they have an ordinary cell membrane, it follows that the laws of diffusion which apply in gases and other cells will also apply with gases and RBCs. Oxygen is the major gas which gets into RBCs, so is carbon monoxide and others