Some amazing medical facts of our body.

Some  amazing medical facts of our body.

• The red blood cell lives for 120 days on average
• There are 2.5 trillion red blood cells in our body at any time. About two and half millions of new ones are to be produced every second by bone marrow.
• Our heart beats about 100000 times per day
• The human heart continues to beat even if it is taken out of our body or cut into pieces.
• 25 million cells are produced each second in our body.
• Nerve impulses travel at a speed of 400 Km/Hr.
• A red blood cell can travel completely through your body in just 20 seconds.
• We inhale about two million liters of air every day through our lungs.  Our lungs are large enough to cover a tennis court.
• 100 billion red blood cells are generated every day in our body.
• Our body contains 70% water.
• In one square inch of our hand, we have nine feet of blood vessels, 600 pain sensors, 9000 nerve ending, 36 heat sensors and 75 pressure sensors.
• Humans gradually start sinking in size from the age of 30 years.
• The life span of  a taste bud is only 10 days.
• It is impossible to sneeze with eyes open.
• The largest artery in our body is the Aorta.  It is almost the diameter of a garden hose.
• The capillaries, on the other hand are so small that it takes ten capillaries to equal the thickness of human hair. 
• The heart pumps about 1 million barrels of blood through out our life time. 
• Babies start dreaming even before they are born.
• The human body can function without a brain.
• A fetus acquires the fingerprints at the age of three months.
• The average human head weighs about 10 pounds and the average human brain weights 3 pounds.
• When you sneeze, all your bodily functions stop, including the heart.
• Human teeth are almost as hard as rocks.
• Every month you grow a brand new outer layer of skin!
• The length of your foot is same as your forearm between your wrist and the elbow.
• Our brain has about 100 billion nerve cells.
• The length of human blood vessel so large that it circles the globe 2 and 1/2 times.
• 80 to 100 hairs fall from our head every day.
• As we grow older, the brain loses one gram per year.
• The heart muscles stop functioning only when we die.
• The total surface area of our brain is 25000 square cms.
• There are 12,00,000 optical fibers in the human eye.
• A drop of blood contains 280 million cells.
• Every one is color blind at birth.
• Liver is the only organ in our body, which regenerates itself completely even after it is removed completely.
• An average scalp has 100000 hair on it.
• The maximum length of hair can be from 70 to 90 cms.
• The life span of hair is 2 to 7 years.
• The human skeleton renews every 3 months.
• The food gets into the stomach even we stand on our head.