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oesophagus

oesophagus (esophagus), from the Greek for gullet, refers to the muscular tube, with a mucus-secreting lining, that leads from the mouth via the pharynx, down through the neck and the thorax, and through the diaphragm to the stomach. In the neck it lies behind the air passages — the lower end of the larynx and the upper part of the trachea. In the thorax, it continues behind the trachea and the heart, to pass into the abdominal cavity through a gap in the muscle of the diaphragm; less than an inch below this, it opens into the stomach. When swallowing occurs, food is pushed into the top of the oesophagus, and is then propelled onwards by waves of circular muscle relaxation below it and of contraction above it: the peristalsis that occurs throughout the gut. This process can if necessary defeat gravity; food, and even liquids, can be swallowed even standing on one's head, though clearly this is not generally attempted except as a remarkable demonstration. Muscle encircling the oesophagus at the top and bottom provides sphincters that, respectively, prevent air being sucked in during inhalation, and regurgitation of stomach contents.

Stuart Judge


See alimentary system; swallowing.

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esophagus

esophagus (Ĭsŏf´əgəs), portion of the digestive tube that conducts food from the mouth to the stomach. When food is swallowed it passes from the pharynx into the esophagus, initiating rhythmic contractions (peristalsis) of the esophageal wall, which propel the food along toward the stomach. The walls of the esophagus are lined with mucous glands that continue the lubrication of the food as it is conducted to the stomach. The human esophagus is about 10 in. (25 cm) long and 1 in. (2.5 cm) in diameter. See digestive system.

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esophagus

e·soph·a·gus / iˈsäfəgəs/ • n. (pl. -gi / -ˌgī; -ˌjī/ or -gus·es ) the part of the alimentary canal that connects the throat to the stomach; the gullet. In humans and other vertebrates it is a muscular tube lined with mucous membrane. DERIVATIVES: e·soph·a·ge·al / iˌsäfəˈjēəl/ adj.

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oesophagus

oesophagus (ee-sof-ă-gŭs) n. the gullet: a muscular tube, about 23 cm long, that extends from the pharynx to the stomach. It is lined with mucous membrane, whose secretions lubricate food as it passes from the mouth to the stomach.
oesophageal adj.

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oesophagus

oesophagus (gullet) The section of the alimentary canal that lies between the pharynx and the stomach. It is a muscular tube whose function is to transfer food to the stomach by means of wavelike contractions (peristalsis) along its length.

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oesophagus

oesophagus (gullet) Muscular tube, part of the alimentary canal (or gut), which carries swallowed food from the throat to the stomach. Food is moved down the lubricated channel by the wave-like movement known as peristalsis.

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oesophagus

oesophagus XIV. — medL. — Gr. oisophágos, of which the first el. is unkn. and the second appears to be -phagos eating.

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oesophagus

oesophagus The part of the alimentary canal that lies between the pharynx and the stomach.

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esophagus

esophagushorrendous, stupendous, tremendous •Barbados • Indus • solidus • Lepidus •Midas, nidus •Aldous • Judas • Enceladus • exodus •hazardous • Dreyfus • Josephus •Sisyphus • typhus • Dollfuss •amorphous, anthropomorphous, polymorphous •rufous, Rufus •Angus • Argus •Las Vegas, magus, Tagus •negus •anilingus, cunnilingus, dingus, Mingus •bogus •fungous, fungus, humongous •anthropophagous, oesophagus (US esophagus), sarcophagus •analogous •homologous, tautologous •Areopagus • asparagus •Burgas, Fergus, Lycurgus •Carajás • frabjous •advantageous, contagious, courageous, outrageous, rampageous •egregious •irreligious, litigious, prestigious, prodigious, religious, sacrilegious •umbrageous • gorgeous

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oesophagus

oesophagushorrendous, stupendous, tremendous •Barbados • Indus • solidus • Lepidus •Midas, nidus •Aldous • Judas • Enceladus • exodus •hazardous • Dreyfus • Josephus •Sisyphus • typhus • Dollfuss •amorphous, anthropomorphous, polymorphous •rufous, Rufus •Angus • Argus •Las Vegas, magus, Tagus •negus •anilingus, cunnilingus, dingus, Mingus •bogus •fungous, fungus, humongous •anthropophagous, oesophagus (US esophagus), sarcophagus •analogous •homologous, tautologous •Areopagus • asparagus •Burgas, Fergus, Lycurgus •Carajás • frabjous •advantageous, contagious, courageous, outrageous, rampageous •egregious •irreligious, litigious, prestigious, prodigious, religious, sacrilegious •umbrageous • gorgeous

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