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Did you know?
There are 20 feet of blood vessels in each square inch of human skin.
Did you know?
More than 50% of American adults have oral herpes, which is commonly known as "cold sores" or "fever blisters." The herpes virus can be active on the skin surface without showing any signs or causing any symptoms.
Did you know?
Blood is approximately twice as thick as water because of the cells and other components found in it.
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?
The first oral chemotherapy drug for colon cancer was approved by FDA in 2001.