1.there are more bacteria in the human mouth than there are people in the world. 2.the little finger of man contributes more than 50% of the strength of the hand. 3.the human body can detect taste in 0.0015 seconds ,which is faster than blinking an eyelid. 4.by the time a person reaches the age of 70,he has drank more than 12,000 gallons of water. 5.there are 67 different species of bacteria in the stomach of an adult person. 6.until the child of man is at least one month old,he cannot shed tears.
7.human teeth are as strong as shark teeth. 8.scientists estimate that are human nose can detect more than a trillon odors. 9.the speed of a human sneeze is about 100 miles per hour when a person sneezes. 10.produces 25,000 quarters of saliva in a human lifetime, enough to fill two swimming pools. 11.your spit contains your complete genetic blueprint.
12.the nails of the hand with which a person writes, grow than the other hand. 13.the human brain uses only 10-watt light bulb of the body. 14.the smallest bone is in the ear and is only 0.1 inch (.25cm) long, which is smaller than grain of rice. 15.a healthy person`s digestive system contains about 5 pound of bacteria.
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