The chemical communication that brings this about is truly staggering to contemplate. Cells communicate by means of hundreds of different kinds of molecules. The message that needs to be transmitted to the stem cell is attached to a protein and sent on its way. The target cell extends a protein receptor that will let the incoming signal be recognized. When this receptor binds to the protein carrying the chemical message, the information reaches the target cell. This article titled, The Color of Blood: Red Blood Cells, shows the some glimpses of the amazing creation of the red blood cells. Join us to learn more.