Blood is approximately twice as thick as water because of the cells and other components found in it.
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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.
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In 1864, the first barbiturate (barbituric acid) was synthesized.
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According to the FDA, adverse drug events harmed or killed approximately 1,200,000 people in the United States in the year 2015.
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Anti-aging claims should not ever be believed. There is no supplement, medication, or any other substance that has been proven to slow or stop the aging process.
General structure of an animal cell
General structure of a plant cell
external structure of female reproductive system
Structure of molybdenum-dependent nitrogenase from Azotobacter vinelandii