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.
Duodenum Overview The duodenum is C- shaped organ located below the stomach and it curves around the pancreas. The duodenum is an upper portion of the small intestine and it is the first and shortest section of the small intestine. It is about 25-30 cm long. The duodenum is a hollow jointed tube that connects the stomach to the jejunum. The duodenum is divided into four sections: superior, descending, horizontal and ascending duodenum.