pyloric orifice(redirected from gastroduodenal orifice)
the opening between the stomach and the superior part of the duodenum.
Etymology: Gk, pyle, gate, ouros, guard; L, orificium, opening
the opening of, or passage between, the stomach into the duodenum, lying to the right of the midline at the level of the upper border of the first lumbar vertebra. The orifice is usually indicated on the surface of the stomach by the circular duodenopyloric constriction.
py·lor·ic or·i·fice(pī-lōr'ik ōr'i-fis) [TA]
The opening between the stomach and the superior part of the duodenum.
1. the entrance or outlet of any body cavity.
2. any foramen, meatus or opening.
The names of most orifices are self-defining, e.g. atrioventricular, preputial. See also ostium.
the opening between the atria and ventricles.
aperture through which the cecum connects with the colon.
the communicating orifice between the ileum and the colon.
slit-like orifice at the ovarian end of the avian oviduct; positioned near the ovary so that it can grasp the newly extruded oocyte.
the orifice between the nasopharynx and oropharynx which is bounded by the palatopharyngeal arches.
the slit-like opening between the maxillary sinus and the middle meatus of the nasal cavity.
large, oval opening at the end of the omasal canal which communicates with the abomasum.
a slit-like opening in the avian urodeum.
aperture between the stomach and duodenum; opens infrequently, solely for the passage of ingesta.
paired orifices in the neck of the bladder.