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Author Question: The most common cause of aneurysms is a. genetic defect. b. external injury. c. old age. d. ... (Read 22 times) |
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Your heart beats over 36 million times a year.
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In 1886, William Bates reported on the discovery of a substance produced by the adrenal gland that turned out to be epinephrine (adrenaline). In 1904, this drug was first artificially synthesized by Friedrich Stolz.
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Human neurons are so small that they require a microscope in order to be seen. However, some neurons can be up to 3 feet long, such as those that extend from the spinal cord to the toes.
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According to the Migraine Research Foundation, migraines are the third most prevalent illness in the world. Women are most affected (18%), followed by children of both sexes (10%), and men (6%).
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This year, an estimated 1.4 million Americans will have a new or recurrent heart attack.