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Author Question: A small percentage of retired African Americans are upper class and worked in places such as a. ... (Read 26 times) |
The human body produces and destroys 15 million blood cells every second.
The familiar sounds of your heart are made by the heart's valves as they open and close.
Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%
Dogs have been used in studies to detect various cancers in human subjects. They have been trained to sniff breath samples from humans that were collected by having them breathe into special tubes. These people included 55 lung cancer patients, 31 breast cancer patients, and 83 cancer-free patients. The dogs detected 54 of the 55 lung cancer patients as having cancer, detected 28 of the 31 breast cancer patients, and gave only three false-positive results (detecting cancer in people who didn't have it).
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.