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?
In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
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Allergies play a major part in the health of children. The most prevalent childhood allergies are milk, egg, soy, wheat, peanuts, tree nuts, and seafood.
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Thyroid conditions may make getting pregnant impossible.
Plants
Plants
Plants
Course of infection by stage
Autosomal dominant inheritance
Animated Light-independent reactions in CAM plants.