White blood cells Travel through your body and destroy harmful bacteria.Some white blood cells have even developed antibodies against bacteria and viruses.
Heart disease is cause when there is plaque buildup in the walls of the arteries.As the plaque builds up the arteries narrow making it more difficult for blood to flow and creating a risk for heart attack or stroke.
Stroke occurs when a blood vessel that carries oxygen and nutrients to the brain is either blocked by a clot or bursts.When that happens, part of the brain cannot get the blood it needs, so it and brain cells die.
High cholesterol Can cause plaque to form between layers of artery walls, making it harder for your heart to circulate blood. Plaque can break open and cause blood clots. If a clot blocks an artery that feeds the brain, it causes a stroke. If it blocks an artery that feeds the heart, it causes a heart attack.