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Pubic lice (crabs) are usually spread through sexual contact. You cannot catch them by using a public toilet.
On average, the stomach produces 2 L of hydrochloric acid per day.
GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.
People with high total cholesterol have about two times the risk for heart disease as people with ideal levels.
If all the neurons in the human body were lined up, they would stretch more than 600 miles.