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:

    She either gives a stomach and no food—
    Such are the poor, in health; or else a feast
    And takes away the stomach—such are the rich,
    That have abundance and enjoy it not.
    William Shakespeare (1564–1616)

    Those with stomach still to copulate strive in vain.
    Samuel Beckett (1906–1989)

    ... 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)