| 1.Your heart beats 101,000 times a day. During your lifetime it will beat about 3 billion times and pump about 400 million litres (800 million pints) of blood. 2.Your mouth produces 1 liter (1.8 pints) of saliva a day. 3.Your eyes are always the same size from birth. 4.The first human sex change took place in 1950 when Danish doctor Christian Hamburger operated on New Yorker George Jargensen, who became Christine Jargensen. 5.If the amount of water in your body is reduced by just 1%, you'll feel thirsty. 6.On average, you breathe 23,000 times a day. 7.Eight million blood cells are produced in the body every second. They replace eight million blood cells that die every second. 8.The average adult eyeball weighs about one ounce. 9.The average duration of a single blink of the human eye is 0.3 seconds. 10.The average human eye can distinguish about 500 different shades of gray. 11.The average human eyelash lives about 150 days. 12.The human thumb is very developed, that it has its own control section in the brain, separate from the other fingers. 13.The average human scalp contains between 120,000 and 150,000 hairs on his or her head. 14.There are about 100 billion neurons in the human brain. Each neuron is linked to hundreds of other neurons, and contains many axons and dendrites. 15.There are 230 joints in the human body. 16.Your blood vessles, the arteries and the veins, are a bit over 60,000 miles long (62,000 miles), or 96,500 kilometers. 17.An average person's hair can grow 50 feet in a lifetime, or about 590 inches (9 inches or 23 centimeters a year, but hair growing slows as you age). 18.There are around 250 million sweat glands, with about 250 thousand of them in your feet. 19.The most common blood type is type O. The rarest is AB. 20.Like a person's fingerprint, no one has the same tongue print. 21.Children grow faster in the springtime than they do in any other season. 22.Close to fifty percent of the bacteria in the mouth lives on the surface of the tongue. 23.The strorage capacity of thr human brain exceeds four terrabytes. 24.Every hour one billion cells in the body must be replaced. 25.Left-handed people are better at sports that require good spatial judgement and fast reaction, compared to right-handed individuals. 26.You use 14 muscles to smile and 43 to frown. 27.If you yelled for 8 years, 7 months and 6 days, you would have produced enough sound energy to heat one cup of coffee. 28.If you fart consistently for 6 years and 9 months, enough gas is produced to create the energy of an atomic bomb. 29.The two lines that connect your top lip to the bottom of your nose is the philtrum. 30.Scientists have recently discovered that smelling an object from your two nostrils separetly may give different pleasant results, because your left nostril is connected to your left brain (hemisphere) and your right nostril is connected to your right side of your brain. 31.Red blood cells are called erythrocytes, and have no nucleus. 31.Of all the white blood cells in the human body (leukocytes), about 30 percent are lymphocytes, about 60 percent are neutrophils, and about 8 percent are monocytes. The remaining white blood cells are eosinophils and basophils. 32.Many proteins function in the human muscle, including myosin, actin, tropomyosin, troponin, and actomyosin. 33.Platelets are also called thrombocytes. 34.Acetycholine is one of several neurotransmitters that transmits action potentials across synaptic gap. Others include norepinephrine, dopamine, and serotonin. 35.Human blood contains about 11,000 white blood cells (leukocytes) to the cubic millimeter (about 1 to every 500 red blood cells). 36.Blood makes up 5% of the human body's weight, occupying a volume of 5.5 1/10 pints (5.2 liters) in the average male adult, and 3.5 quarts (3.3 liters) in the average female adult. 37.The human lungs contain 300,000 million tiny blood vessels which would stretch for 1,500 miles (2,400 kilometers) if laid to end to end. 38.Every breath of the lungs brings 350 milliliters of fresh air and expels 150 milliliters of stale air from the nose and throat. 39.The eye contains 137 million might-sensitive cells in an area of about 1 square inch (650 square millimeters). 40.There are 130 million rod cells for black and white vision and 7 million cone cells for color vision in the human eye. 41.The human stomach can hold about 2.6 pints (1.5 liters) of liquid. 42.The largest artery in the human body is the aorta. 43.Human hair grows faster in the summertime, at a 10% to 15% increase, than on average. 44.There are 26 billion cells in a newborn baby, and 50 trillion cells in an adult. 45.Kids have 20 first teeth. Adults have 32. 46.About 400 gallons of blood flow through your kidneys in one day. |
| Anatomy Facts |
| Amazing and scientific facts about the human body. |
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