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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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More than 150,000 Americans killed by cardiovascular disease are younger than the age of 65 years.

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Women are two-thirds more likely than men to develop irritable bowel syndrome. This may be attributable to hormonal changes related to their menstrual cycles.

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There are 20 feet of blood vessels in each square inch of human skin.

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Although not all of the following muscle groups are commonly used, intramuscular injections may be given into the abdominals, biceps, calves, deltoids, gluteals, laterals, pectorals, quadriceps, trapezoids, and triceps.

Head rubbing and licking are common social behaviours within a pride Head rubbing and licking are common social behaviours within a pride
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Video: Properties of water -structure of water and polarity (Ionized and polar compounds)

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