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It is believed that the Incas used anesthesia. Evidence supports the theory that shamans chewed cocoa leaves and drilled holes into the heads of patients (letting evil spirits escape), spitting into the wounds they made. The mixture of cocaine, saliva, and resin numbed the site enough to allow hours of drilling.
The effects of organophosphate poisoning are referred to by using the abbreviations “SLUD” or “SLUDGE,” It stands for: salivation, lacrimation, urination, defecation, GI upset, and emesis.
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
If you could remove all of your skin, it would weigh up to 5 pounds.
Human stomach acid is strong enough to dissolve small pieces of metal such as razor blades or staples.