The length from your wrist to your elbow is the same as the length of your foot.
Your heart beats 101,000 times a day. During your lifetime it will beat about 3 billion times and pump about 400 million litres (800 million pints) of blood.
Your mouth produces 1 litre (1.8 pints) of saliva a day.
On average, people can hold their breath for one minute. The world record is seven-and-a-half minutes.
The human head contains 22 bones.
On average, you breathe 23,000 times a day.
On average, you speak almost 5,000 words a day - although almost 80% of speaking is self-talk (talking to yourself).
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