1. Lungs of an adult human have surface area of about 70 square metres.
2. Your left and right lungs are not the same. The left lung have 2 lobes while the right one has 3. The left lung is slightly smaller allowing room for your heart.
3. Human lungs contain 1500 miles of airways and 300 million alveoli.
4. Your nose and ears continue growing throughout your entire lifetime.
5. Your sense of smell is around 100 times more sensitive than your sense of taste.
6. Let's talk more of smell: Around 80% of what we think is taste is actually smell.
7. The brain used over a quater of the oxygen supply used by human body. And unfortunately, it's the first organ to respond to low oxygen.
8. If you smoothed out all of the wrinkles in your brain, it would lay flat the size of a pillow case.
8. If you smoothed out all of the wrinkles in your brain, it would lay flat the size of a pillow case.
9. Your heart beats 100,000 times a day, 365 million times a year and over a billion times if you're beyond 30.
10. The heart of heart of healthy human adult beat about 75 times in a minute.
11. You can't breathe and swallow at the same time.
12. There are about 10,000 taste buds on human tongue.
13. While awake, your brain produces enough electricity to power a light bulb.
14. On average human body contain enough iron to make an inch nail.
15. The cornea it the only part of the body without oxygen supply, it get its oxygen directly from the air.
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