From Sneezes To Fingernail Growth, Here Are 63 Weird, Wacky, And Interesting Facts About The Human Body THE BRAIN 1. Nerve impulses to and from the brain travel as fast as 170 miles per hour. 2. The brain operates on the same amount of power as 10-watt light bulb. 3. Scientists say the higher your IQ the more you dream. 4. The brain itself cannot feel pain. 5. 80% of the brain is water. HAIR & NAILS 6. Blondes have more hair. 7. Fingernails grow nearly 4 times faster than toenails. 8. The lifespan of a human hair is 3 to 7 years on average. 9. You must lose over 50% of your scalp hairs before it is apparent to anyone. 10. Human hair is virtually indestructible. INTERNAL ORGANS 11. The acid in your stomach is strong enough to dissolve razorblades. 12. The human body is estimated to have 60000 miles of blood vessels. 13. You get a new stomach lining every three to four days. 14. The surface area of a human lung is equal to a tennis court. 15. Scientists have counted over 500 different liver functions. 16. Your left lung is smaller than your right lung to make room for your heart. 17. You could remove a large part of your internal organs and survive. BODILY FUNCTIONS 18. Sneezes regularly exceed 100 mph. 19. Women blink twice as many times as men do. 20. Feet have 500000 sweat glands and can produce more than a pint of sweat a day. 21. During your lifetime, you will produce enough saliva to fill two swimming pools. SEX & REPRODUCTION 22. On any given day, sexual intercourse …
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