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Did you know?
The average office desk has 400 times more bacteria on it than a toilet.
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It is widely believed that giving a daily oral dose of aspirin to heart attack patients improves their chances of survival because the aspirin blocks the formation of new blood clots.
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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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Blood in the urine can be a sign of a kidney stone, glomerulonephritis, or other kidney problems.
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Every 10 seconds, a person in the United States goes to the emergency room complaining of head pain. About 1.2 million visits are for acute migraine attacks.
![Enhanced photomicrograph showing a macrophage (purple) attack- ing bacillus Escherichia coli (green)](https://biology-forums.com/gallery/47/medium_14755_10_09_12_7_19_04_85102225.jpeg)
![Asthma. (a) A normal bronchiole. (b) An asthmatic bronchiole. During an asthma “attack,” the bronchi](https://biology-forums.com/gallery/47/medium_14755_11_11_12_7_23_10_100501287.jpeg)