You might already know that the average human has between 4.7 and 5 litres of blood in their body, but did you know that your nose runs when it’s cold because of increased blood flow to warm it up, which causes the blood vessels to dilate and produce more mucus? Our latest infographic explores loads of amazing facts about blood, so you can learn more about how your body works and functions. Take a look at the infographic to find out more.
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