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Did you know?

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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Vital signs (blood pressure, temperature, pulse rate, respiration rate) should be taken before any drug administration. Patients should be informed not to use tobacco or caffeine at least 30 minutes before their appointment.

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The heart is located in the center of the chest, with part of it tipped slightly so that it taps against the left side of the chest.

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Bacteria have been found alive in a lake buried one half mile under ice in Antarctica.

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The immune system needs 9.5 hours of sleep in total darkness to recharge completely.

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