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 U-shaped portion of the small intestine that connects the stomach to the intestine. The bile duct from the gall bladder enters the duodenum. The pancreas is located on the duodenum and the lower stomach.The secretions of the pancreas enter the duodenum by way of the pancreatic duct.he colon is the narrowed continuation of the valvular intestine. It is located at the posterior end of the body cavity. The rectal gland is a slender, blind-ended, finger-like structure that leads into the colon by means of a duct.