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30 Fun Facts about the Human Body!

1. Your mouth produces about 1⁄4 of a gallon of saliva each day. 2. An adult’s blood vessels, laid end to end, could circle the Earth’s equator around 4 times. 3. The word “muscle” comes from the Latin word, ​musculus​, meaning “little mouse” because that is what Ancient Romans thought flexed bicep muscles looked like. 4. You lose about 9 pounds of skin cells every year. 5. Babies do not shed tears until they are at least one month old. 6. The human heart beats more than