Some people love it, some people hate it, but every single one of us would not be alive without it. Blood. There are those among us who claim to be vampires, and will actually drink the blood of others. Others get queasy just thinking about blood or may even faint at the sight of it. When in comes to blood, you really can say that we’re all “full of it.” The average adult has about 6 liters, but that can vary depending on the person’s size. Here are some little-known facts about blood.

1. A Long Way to Grow

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A typical newborn baby has only about a cup of total blood volume circulating in his or her body.