Red blood cell being dissolved in body fluid) was an important step in the evolution of vertebrates as it allows for less viscous blood, higher concentrations of oxygen, and better diffusion of oxygen from the blood to the tissues. The size of red blood cells varies widely among vertebrate species; red blood cell width is on average about 25% larger than capillary diameter, and it has been hypothesized that this improves the oxygen transfer from red blood cells to tissues. The red blood cells of mammals are typically shaped as biconcave disks: flattened and depressed in the center, with a dumbbell-shaped cross section,
Blood Red Sandman Blood Red Sandman "Blood Red Sandman" is the second single from Lordi's second album "The Monsterican Dream". The song's original title was "Blood Red Santa", but Asko Kallonen from BMG Finland thought it was inappropriate for a Christmas hit and many people said they would ban it because it painted a violent image of Santa. In a rebuttal to this Lordi decided to change the songs name to Blood Red Sandman which worked just as well as the original name. There is also a promo version given out by Mayan Records for promotion to their compilation album The Monster Show.