White blood cells, along with platelets and red blood cells, are key structures produced by your bone marrow. In particular, white blood cells play an important role in your immune system to help ...

red blood cells, white blood cells and platelets. The heart is a muscular organ with four chambers. Located just behind and slightly left of the breastbone, it pumps blood through the network of ...

The components of blood include plasma, platelets, and red and white blood cells that circulate through the body. Blood supplies essential substances, such as sugars and oxygen, to cells and ...

Some cells do repairs if you get a cut. Red blood cells deliver oxygen and take away rubbish. And your white blood cells are like police looking for germs. There's a lot going on inside you!