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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
More than 4.4billion prescriptions were dispensed within the United States in 2016.
Asthma occurs in one in 11 children and in one in 12 adults. African Americans and Latinos have a higher risk for developing asthma than other groups.
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.