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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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When blood is deoxygenated and flowing back to the heart through the veins, it is dark reddish-blue in color. Blood in the arteries that is oxygenated and flowing out to the body is bright red. Whereas arterial blood comes out in spurts, venous blood flows.

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For about 100 years, scientists thought that peptic ulcers were caused by stress, spicy food, and alcohol. Later, researchers added stomach acid to the list of causes and began treating ulcers with antacids. Now it is known that peptic ulcers are predominantly caused by Helicobacter pylori, a spiral-shaped bacterium that normally exist in the stomach.

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The word drug comes from the Dutch word droog (meaning "dry"). For centuries, most drugs came from dried plants, hence the name.

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Green tea is able to stop the scent of garlic or onion from causing bad breath.

Evolutionary adaptation to a new environment via natural selection. Evolutionary adaptation to a new environment via natural selection.
The Environment Influences Gene Expression The Environment Influences Gene Expression
B, The nurse teaches the postoperative client to use an incentive spirometer to expand the lungs. B, The nurse teaches the postoperative client to use an incentive spirometer to expand the lungs.
Selective pressures from the environment influence adaptation Selective pressures from the environment influence adaptation
Metamorphic Grade "الصخور المتحولة" Metamorphic Grade "الصخور المتحولة"
A farmer has 100 acres of land on which she plans to grow wheat and corn. Each acre of wheat ... A farmer has 100 acres of land on which she plans to grow wheat and corn. Each acre of wheat ...
Video: Properties of macromolecules (Explained with No Audio)

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