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!
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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