INSIDE red blood cells.It carries oxygen. Red blood cells also remove carbon dioxide from your body, transporting it to the lungs for you to exhale.Red blood cells are made in the bone marrow. They live for about 120 days, and then they die.White blood cells are also called leukocytes. They protect us from illness and disease against both INFECTIOUS disease and foreign invaders.White blood cells account for only about 1% of blood.White blood cells are made in the bone marrow. They are STORED in your blood and lymph tissues because some white blood cells have a short life of 1 to 3 days, bone marrow is always making them.Platelets are tiny blood cells that help the body form clots to stop bleeding. The process of spreading across the SURFACE of a damaged blood vessel to stop bleeding is called adhesion. Platelets are made in your bone marrow along with your white and red blood cells.Once platelets are made and circulated into your BLOODSTREAM, they live for 8 to 10 days.A normal platelet count is 150,000 to 450,000 platelets per microliter of blood.Plasma is the largest part of your blood. It makes up more than half (about 55%) of its overall content. When separated from the rest of the blood, plasma is a light yellow liquid. Plasma carries water, salts and enzymes.The main role of plasma is to take nutrients, hormones, and proteins to the parts of the body that need it.