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True facts about the human body The human brain is much more powerful than a computer. According to experts, the average brain has a storage capacity of about 100 terabytes, while the typical PC offers only a fraction of that, about 100 gigabytes. The human body has roughly 60,000 miles of blood vessels. The arteries, veins, and capillaries, would be 60,000 miles long if they were laid out end to end. The human nose can remember 50,000 different scents. Humans have about 5 million odor receptors, while dogs, depending on the breed, may have more than 220 million. A human sneeze can exceed 100 miles per hour. A sneeze’s velocity enables it to propel germs up to 12 feet. The human body contains about 32 million bacteria per square inch. The human body contains 10 times more bacteria per square inch than the average toilet bowl does. The largest internal organ in the human body is the small intestine. If you unfolded the small intestine, you’d find it was roughly 23 feet long. Three hundred million cells die every minute in the human body. Scientists estimate that the average human body contains between 10 and 50 trillion cells, so it can afford to lose a few here and there. Human stomach acid is strong enough to dissolve razorblades. According to scientists, human stomach acid is seriously powerful stuff—so strong, in fact, that it’s capable of dissolving razorblades. But whatever you do, don’t attempt to swallow one. Humans produce enough saliva to fill one or two swimming pools during their lifetime. Saliva helps to keep the mouth lubricated and plays a key role in the digestive process. Most experts believe that humans produce between 0.75 and l.5 liters of the fluid a day.
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