Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
Did you know?
Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.
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Illicit drug use costs the United States approximately $181 billion every year.
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Thyroid conditions may make getting pregnant impossible.
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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.
True-color view of Mars seen through NASA's Hubble Space Telescope in 1999
True Forget-Me-Not
The correct statement about hormones-insulin and glucagon