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.
Did you know?
Human kidneys will clean about 1 million gallons of blood in an average lifetime.
Did you know?
The human body produces and destroys 15 million blood cells every second.
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Autoimmune diseases occur when the immune system destroys its own healthy tissues. When this occurs, white blood cells cannot distinguish between pathogens and normal cells.
Did you know?
Liver spots have nothing whatsoever to do with the liver. They are a type of freckles commonly seen in older adults who have been out in the sun without sufficient sunscreen.
master biology chapter 22-25
These monolithic figures from Easter Island suggest the contemplative nature of philosophy, which ca
E9-23 Prepare income statements Explain the difference in operating income
A crowd in Iceland reflects its narrow range of genetic diversity