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?
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
About 3.2 billion people, nearly half the world population, are at risk for malaria. In 2015, there are about 214 million malaria cases and an estimated 438,000 malaria deaths.
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Throughout history, plants containing cardiac steroids have been used as heart drugs and as poisons (e.g., in arrows used in combat), emetics, and diuretics.
tools
Smartphone See Through
Upper Paleolithic stone tools include blade-based tools as seen here being produced from a blade cor
Kara Walker, Insurrection! (Our Tools Were Rudimentary, Yet We Pressed On).