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Did you know?
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?
If you could remove all of your skin, it would weigh up to 5 pounds.
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There are over 65,000 known species of protozoa. About 10,000 species are parasitic.
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The eye muscles are the most active muscles in the whole body. The external muscles that move the eyes are the strongest muscles in the human body for the job they have to do. They are 100 times more powerful than they need to be.
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People about to have surgery must tell their health care providers about all supplements they take.