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Author Question: A member of the football team has collapsed face-down on the field after a hard tackle. As you ... (Read 31 times) |
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The average adult has about 21 square feet of skin.
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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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When blood is exposed to air, it clots. Heparin allows the blood to come in direct contact with air without clotting.
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The ratio of hydrogen atoms to oxygen in water (H2O) is 2:1.
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Human kidneys will clean about 1 million gallons of blood in an average lifetime.