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
Famous quotes containing the word stomach:
“When the sky is clear, carry an umbrella; though your stomach is full, carry provisions.”
—Chinese proverb.
“... the great mistake of the reformers is to believe that life begins and ends with health, and that happiness begins and ends with a full stomach and the power to enjoy physical pleasures, even of the finer kind.”
—Katharine Fullerton Gerould (1879–1944)
“Prithee do not turn me about, my stomach is not constant.”
—William Shakespeare (1564–1616)