The stomach is a muscular, hollow, dilated part of the digestion system which functions as an important organ of the digestive tract in some animals, including vertebrates, echinoderms, insects (mid-gut), and molluscs. It is involved in the second phase of digestion, following mastication (chewing).

The stomach is located between the esophagus and the small intestine. It secretes protein-digesting enzymes and strong acids to aid in food digestion, (sent to it via oesophageal peristalsis) through smooth muscular contortions (called segmentation) before sending partially digested food (chyme) to the small intestines.

The word stomach is derived from the Latin stomachus which is derived from the Greek word stomachos, ultimately from stoma (στόμα), "mouth". The words gastro- and gastric (meaning related to the stomach) are both derived from the Greek word gaster (γαστήρ).

Read more about Stomach:  Role in Digestion, Anatomy of The Stomach, Control of Secretion and Motility, EGF in Gastric Defense, Stomach As Nutrition Sensor, Absorption, Diseases of The Stomach, In Other Animals

Other articles related to "stomach":

Stomach (Fu)
... Stomach, a concept from traditional Chinese medicine as distinct from the Western medical concept of stomach, is more a way of describing a set of ... The Stomach and its paired organ, the Spleen, are associated with the element of earth and the emotions of anxiety and stress ...
Stomach - In Other Animals
... Although the precise shape and size of the stomach varies widely among different vertebrates, the relative positions of the oesophageal and duodenal openings remain relatively constant ... However, lampreys, hagfishes, chimaeras, lungfishes, and some teleost fish have no stomach at all, with the oesophagus opening directly into the intestine ... Furthermore, in many non-human mammals, a portion of the stomach anterior to the cardiac glands is lined with epithelium essentially identical to that of the oesophagus ...
Stomach Disease - Causes and Treatment
... Smoking has been linked to a variety of disorders of the stomach ... Chronic stomach problems have also been linked to excess intake of alcohol ... It has been shown that alcohol intake can cause stomach ulcer, gastritis and even stomach cancer ...
Stomach Disease - Chronic Disorders - Gastroparesis
... Basically in gastroparesis, the stomach motility disappears and food remains stagnant in the stomach ... it can also occur from a blockage at the distal end of stomach, a cancer or a stroke ...
Stomach Disease
... The stomach is an important organ in the body ... The stomach connects to the esophagus above and to the small intestine below ... The stomach does vary in size but its J shape is constant ...

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