Answer: ÝApproximately 80% of total body iron is ultimately incorporated into red cell hemoglobin. An average adult produces 2 x 1011 red cells daily, for a red cell renewal rate of 0.8 percent per day. Each red cell contains more than a billion atoms of iron, and each ml of red cells contains 1 mg of iron. To meet this daily need for 2 x 1020 atoms (or 20 mg) of elemental iron, the body has developed regulatory mechanisms whereby erythropoiesis profoundly influences iron absorption. Plasma iron turnover (PIT) represents the mass turnover of transferrin-bound iron in the circulation, expressed as mg/kg/day (Huff et al., 1950). Accelerated erythropoiesis increases plasma iron turnover, which is associated with enhanced iron uptake from the gastrointestinal tract (Weintraub et al., 1965). The mechanism by which PIT alters iron absorption is unknown.
Answer: There a number of important elements that the body uses: C,H,N,O,P, S (CHNOPS). As you see nitrogen is one of these 6. The most important use is in the nitrogen bases. These include DNA and RNA. Each has a nitrogenous base. The ones in DNA code for proteins. This code is for production of an organism such as ourselves. RNA also has bases and RNA is important in the "reading" and "translation" of these bases.
Answer: Large venous air embolisms (centimeters) may lead to death if they become lodged in the heart. if big enough they can cause the heart to loose prime and as a result stop the bood from flowing from the right ventricle to the lungs. Gas embolism into an artery, termed arterial gas embolism, or AGE, is a more serious matter than in a vein, since a gas bubble in an artery may directly cause stoppage of blood flow to an area fed by the artery. The symptoms of AGE depend on the area of blood flow, and may be those of stroke or heart attack if the brain or heart, respectively, are affected. The amount of arterial gas embolism which causes symptoms depends on location, but in the brain may be a bubble with a volume only a fraction of a milliliters. (sourced from wikipedia)
Answer: It depends on what you mean by "warts" Warts are cause by a virus, so this virus in in the blood stream. HPV is the main cause of genital warts and is transmitted sexually. The virus attacks the cells of the skin, and causes warts to develop on the surface