There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
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Asthma is the most common chronic childhood disease in the world. Most children who develop asthma have symptoms before they are 5 years old.
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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.
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The FDA recognizes 118 routes of administration.
Element Cube
Elements found in the element cube
Latest element on the Periodic Table
A Human Element Emerges
He element M forms the chloride MCl4 containing 75.0% Cl by mass. What is the atomic weight of ...