[AntonioLao]

Erythrocyte is the scientific name of a red blood cell (RBC). There are about 5 millions of them in one cubic millimeters of plasma. In a human being, the blood is about 1/12 of the body weight, which is about 1½ gallons. It consists of about ½ plasma fluid and ½ solid cell formed elements. It functions as a garbage collector of carbon dioxide molecules (CO2) and as distributor of oxygen molecules (O2) and nutrients. It also performs defenses against alien invasions such as germ warfares and virus attacks and chemical contaminants. The purpose of this discussion is not to give a course in microbiology but to talk about the structure of the RBC in connection to the possible existence of time axis.

The shape of an average RBC is like a donut. The central region is not really a hole but double concave depressions maximizing the surface area for oxygen intake by hemoglobin. The thickness is about 2 microns and the width is about 7 microns. The ratio of thickness to width gives an angle of about 16 degrees at the perimeter but a lot less for the central angle. If the shape is spherical then the angle would be 45 degrees. If the RBCs were all spherical, while still performing their functions at maximum efficiency then a human will live a very long time.