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.
The duodenum is a short tube-like structure that is considered as the first and the shortest segment of the small intestine. The other two parts of the small intestine are jejunum and ileum.But sometimes, the duodenum is also regarded as a separate structure.he duodenum is located just below the stomach, and its first part is quite close to the liver and the pancreas. It is located between the stomach and the jejunum. Anatomically, this small organ is divided into four parts or segments, which are known as the superior, descending, horizontal, and ascending duodenum.