This point is made crystal clear even when we take a look back over the last few years. According to the National Sleep Foundation (NSF), a U.S. nonprofit organization of researchers, patients and health-care facilities, 20% of Americans reported getting six hours of sleep or less in 2009, compared to 13% in 2001.
An ulcer (/ËÊlsÉr/; from Latin ulcus, ulcer, sore) is a break in the skin or mucous membrane with loss of surface tissue and the disintegration and necrosis of epithelial tissue. A mucosal ulcer is an ulcer which specifically occurs on a mucous membrane.
A peptic ulcer is a sore or hole that forms in the lining of the stomach or intestine. The word peptic refers to the digestive tract. An ulcer in the lining of the stomach is a gastric ulcer. An ulcer in the first part of the small intestine is a duodenal ulcer. The lining of the stomach is a layer of special cells and mucous. Mucous prevents the stomach and duodenum from being damaged by acid and digestive enzymes. If there is a break in the lining (such as an ulcer), the tissue under the lining can be damaged by the enzymes and corrosive acid. If the ulcer is small, there may be few symptoms. The wound can heal on its own.