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Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

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During the twentieth century, a variant of the metric system was used in Russia and France in which the base unit of mass was the tonne. Instead of kilograms, this system used millitonnes (mt).

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Aspirin may benefit 11 different cancers, including those of the colon, pancreas, lungs, prostate, breasts, and leukemia.

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More than 2,500 barbiturates have been synthesized. At the height of their popularity, about 50 were marketed for human use.

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On average, someone in the United States has a stroke about every 40 seconds. This is about 795,000 people per year.

A nurse prepares a client for anesthesia and surgery. A nurse prepares a client for anesthesia and surgery.
Nebulizer. The nebulizer converts a liquid medication to a mist that is easily inhaled. A face mask, Nebulizer. The nebulizer converts a liquid medication to a mist that is easily inhaled. A face mask,
Arthroscopic surgery. Arthroscopic surgery.
Both humans and apes readily engage in learned imitative behavior. Both humans and apes readily engage in learned imitative behavior.
For ice massage, ice is frozen in a cylindrical container or a paper cup (A). The top half of the cu For ice massage, ice is frozen in a cylindrical container or a paper cup (A). The top half of the cu
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Video: Factors that influence muscle tension - Sarcomere length and force, understretched and overstretched

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