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Did you know?
Adult head lice are gray, about ? inch long, and often have a tiny dot on their backs. A female can lay between 50 and 150 eggs within the several weeks that she is alive. They feed on human blood.
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If all the neurons in the human body were lined up, they would stretch more than 600 miles.
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About 600,000 particles of skin are shed every hour by each human. If you live to age 70 years, you have shed 105 pounds of dead skin.
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Approximately 70% of expectant mothers report experiencing some symptoms of morning sickness during the first trimester of pregnancy.
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The familiar sounds of your heart are made by the heart's valves as they open and close.
![Abduction and Adduction Abduction–Moving a body part away from the middle. Adduction–Moving a body p](https://biology-forums.com/gallery/47/medium_14755_24_09_12_7_37_45_89521021.jpeg)
![Circular petrissage to forehead. Use the thumbs moving in counterclockwise circles. The movement is ...](https://biology-forums.com/gallery/33/medium_380798_23_08_17_1_47_41_33120769.jpeg)