9: By the age of 18, the human brains stop growing. It even begins to lose more than 1,000 brain cells after such age. Your brain comprises only 2 percent of your body weight but uses up to 20 percent of your body’s energy. Your brain never takes a break even when you are sleeping; the brain is busy working to replenish the brain processes needed to function normally while awake.
8: An average human produces 10,000 gallons of saliva in a lifetime.
7: It is impossible to sneeze without blinking your eyes. The highest recorded speed of a human sneeze is 165 kilometer per hour.
6: The human body sheds about 40 pounds of skin in a lifetime. Our skin produces antibacterial chemicals to keep germs at a bay. It also produces antimicrobial peptides that protect the body from infection.
5: You can’t swallow and breathe at the same time; however babies can do this but until they are about nine months.
4: Yawning helps you cool your brain. It is an involuntary behavior. When you yawn, the influx of cool air may ventilate your sinuses and facilitate brain cooling.
3: Your heart is said to beat nearly 3 billion times if you live an average life span of seventy years.
2: Your lungs need a lot of breathing room. The total surface area of the lungs is approximately equal to the size of a tennis court.
1: Each person has a unique tongue print just like the fingerprints.
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