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Did you know?
Intradermal injections are somewhat difficult to correctly administer because the skin layers are so thin that it is easy to accidentally punch through to the deeper subcutaneous layer.
Did you know?
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?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
If all the neurons in the human body were lined up, they would stretch more than 600 miles.
Did you know?
Thyroid conditions cause a higher risk of fibromyalgia and chronic fatigue syndrome.