Sense of course of a working life first attested 1803. v. 1590s, to charge at a tournament, from career (n.). The meaning move rapidly, run at full speed (1640s) is from the image of a horse passing a career on the jousting field, etc. Related: Careered; careering.
Contractions of the stomach muscle, called peristaltic waves, grind, crush and mix the food producing a liquefied substance called chyme.. The pyloric sphincter separates the stomach from the duodenum. This valve keeps food and gastric juices in the stomach until liquefied enough to proceed into the duodenum.
Digestive health centre. Duodenitis. Duodenitis is inflammation of the duodenum, the first part of the small intestine. The duodenum is a 30cm long tube connecting the stomach to the rest of the small intestine. Duodenitis symptoms. Duodenitis can lead to symptoms of indigestion (dyspepsia) or stomachache.