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Author Question: Lines on drawings used to show the main outline of a structure, including exterior walls, interior ... (Read 59 times) |
The first documented use of surgical anesthesia in the United States was in Connecticut in 1844.
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.
In the ancient and medieval periods, dysentery killed about ? of all babies before they reach 12 months of age. The disease was transferred through contaminated drinking water, because there was no way to adequately dispose of sewage, which contaminated the water.
The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
Normal urine is sterile. It contains fluids, salts, and waste products. It is free of bacteria, viruses, and fungi.