Tuesday, May 19, 2009

Interesting human body statistics

Brain-It makes up only 2% of the body weight, but uses 20% of the oxygen and blood supply. Human brain stores information equal to 500,000 sets of encyclopedia Britannica. At a time our brain can retain 7 facts in the short-term memory. Neurons are the longest cells in our body.


Heart
–The hollow muscle pumps enough blood in an average lifetime to fill the fuel tanks of 56 moon rockets. Its involuntary contractions begin 4 weeks after conception, before nerve cells are formed and continue to pulse even out of the body in saline solution. Muscle cells of the heart generate a total electric current of about 2 watts that commands the fibers to contract.


Lungs
-Adult human lung have an internal area of 93 m2, which is 40 times the external surface of human body.


Stomach
–It produces 2 litres of hydrochloric acid daily.5 lakhs cells of stomach’s inner walls are replaced every minute so that the acid doesn’t damage the walls.


Muscles
-There are 639 muscles, which account for 40% of the total body weight. It takes 17 muscles to smile and 42 to stare.


Tongue
-The tongue contains more than 10,000 taste buds, which are renewed weekly. It can distinguish 500 different tastes.

Eyes-We spends 30 minutes everyday, being blind. (The time taken for blinking)

Ear- Our ear can detect 1500 different tunes and 350db of loudness.

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