The body contains around 4 to 5 liters of blood circulating in our bodies all the time, all day long, every day. The fact that blood is essential for life because it circulates and delivers important nutrients and oxygen to the body’s cells. It also takes the metabolic waste products away from these cells.
Blood is very unique in its composition, it can’t be manufactured or made. The only source of blood for patients in need of blood transfusion is generous blood donors.
Blood components
Four main components make the human blood, and they are: