Cells that are in your body do different things. You just can't feel them. They
are so microscopic that you can't see them with the naked eye. Under a
microscope you can see a wholo lot of cells. The cells that you will see most
often are red blood cells. When you cut your hand and blood seeps out, millions
upon millions of red blood cells pour out. In one drop, there are so many blood
cells that it would take a week to count them all, even under a microscope. The
red blood cells take the oxygen from your heart to the rest of your body.
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