It takes about one minute for a single red blood cell to travel around your entire body.

It takes about one minute for a single red blood cell to travel around

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Only 1/6 of the human eyeball is exposed

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Although our nose and ears keep growing throughout our lives, our eyes

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The muscles which help your eyes to focus complete around 100,000

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When you swallow, your food travels down your oesophagus to your stomach

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Every person, including identical twins, has a unique eye and tongue