Red blood cell is a non nucleated blood cells, which represent on of the cellular components of blood ,besides white blood cells and platelets. Red blood cell help the body to stay at normal physiological state by carrying the oxygen, glucose and other essential nutrients to all cells of the body. When the number of the red blood cell decrease, the body will face anemia which is a very serious health problem, that may lead to severe complications particularly among pregnant ladies and young children, also you will find many other disorders affecting red blood cells inside this book.