No nucleus to provide more space for haemoglobin. White blood cell Defend the body against disease. Large cells that contain a nucleus. There are 2 types: Lymphocytes – make antibodies.

Well, the blood has to be kept moving around all the time because it's the body's delivery system ... Red blood cells deliver oxygen and take away rubbish. And your white blood cells are like ...

In each cubic millimetre of blood, there are more than five million red blood cells, thousands of white cells and 250,000 to 450,000 platelets for blood clotting. Every second, 2.5 million new red ...

It is composed of platelets which control clotting to stop the body bleeding out; white blood cells which form our ... that form the adult human circulatory system. Keeping well hydrated is ...

George Washington died after his physician treated his sore throat with bloodletting, but don't let that stop you from ...