Digestion: Describe the digestion of a burger Essay

DigestionA burger is broken stamp out mechanically by biting into it. The sustenance in the mouth sets forward salivary glands that secrete salivary amylase, which splits down amylase in the burger. When the food is broken down enough, the tongue shapes the food in a bolus, or a ball. The bolus is pushed rearward to the pharynx at the back of the throat. The food stimulates the inception of the flap so the good goes down the esophagus, earlier than the windpipe. Because of peristalsis, rhythmic waves created by muscles in the throat, the food slides easily down the digestive tract. Salivary amylase continues to break down the starch all the way down the esophagus.When the burger reaches the stomach, the epithelium, or stomach wall, secretes gastric juice which has a precise high concentration of hydrochloric acid and breaks up the burger. In the gastric juice is also an enzyme that hydrolyzes proteins called pepsin. This pepsin starts out as the inactive pepsinogen, and is a ctivated by hydrochloric acid in the epithelium. After this, the burger is churned in the stomach and becomes chyme, or vomit.From the stomach, the burger goes by dint of the pyloric sphincter and into the small catgut. In the first gear 25 cm of the small intestine, the food goes with the duodenum, a place where pancreatic enzymes and bile from the brave are stored. Bile, along with the enzyme lipase, breaks down fat piece the enzyme nuclease breaks down nucleic acids and various enzymes, such as trypsins and peptidases, break down the proteins. These substances are called by hormones which act found on stimuli received, such as the food in the duodenum. Absorption also occurs in the small intestine because of its grownup get on area. It has a very large surface area because villi, or finger desire projections on the surface, contain microvilli, smaller projections on the surface of the villi. Because of this, the surface area of the small intestine is greatly increased.Th e large intestine, or colon, has the job of retaining water. It reabsorbs water and nutrients that continue in the lumen. The undigested materials are then excreted in feces, and the digestion of the burger is completed.