Unknown facts about human body
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UNKNOWN FACTS 
ABOUT HUMAN BODY
1. Blood vessels in adults
•Don't be shocked after knowing that an earth equator 
can be circle four times using blood vessels. 
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2. Saliva production
•About one liter of saliva produced by our salivary 
glands each day.
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3. Brain activity
•The brain is not that much active when you work, 
but highly active when you are asleep. 
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4. Heart 
•The heart needs cardiac impulse for the easy 
circulation of the blood. 
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5. Tears
•Tears are important for clear vision and to maintain 
eye health. 
•The baby does not shed a single tear until one 
month. 
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6. Heartbeat
•In the average life span of human beings, the 
heartbeats more than three billion times. 
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7. Blood
•The 8% weight in a normal 
person is consist of blood. 
•Blood is a mixture of 
plasma and cells. 
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8. Lungs
•Lungs are like balloons and the right lung is about 
10% bigger than the left one. 
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9. Fastest growing part in the 
human body
•If you think hair or nail is the fastest-growing part 
of the human body then you are wrong. 
•The bone marrow grows faster in the human body. 
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