The human body is made up of 50 to 75 trillion ( = million millions) cells. 2.5 trillion of them are red blood cells. To stay functional the body replaces about 25 million cells per second!
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The gastric acid in your stomach contains hydrochloric acid and sodium chloride (pH 1 -2). If you would remove the protective layer of mucus in your stomach, the stomach would digest itself…
A sneeze can exceed 160kph, a cough 100kph and a male ejaculation 45kph.
Humans walk at around 4kph, run up to 38kph. Hair grows at a rate of 1.25cm per month, while a fingernail grows about 3.5cm a year. |
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