Digestion System Essay

The digestion system is also called the gastrointestinal (GI) tract, which is an open tube run from the mouth to the anus. It contains many different organs that have different jobs and function to help break down the food molecules into smaller molecules for our body to ingest and absorption nutrients, vitamins, eliminate toxic substances. The first digestion always takes place at the mouth by using teeth to chew or grand food into smaller molecules which make it easier for the digestion process. Combine with that is a secretion of a thin mucus fluid called saliva from the three sets of salivary glands of the mouth which is the exocrine glands that supply enzymes that contain amylase secrete in the mouth. These enzymes help in breaking down

This is where all the absorption of nutrients will take place and it is the final stages of the process. The key for absorption to occur here are the villi which are the small blood vessels look like fingers that contain microvilli which are smaller help to increase the absorption by their structure and movement. As chyme enters into the small intestine, hormones will signal other organs to secrete digestive juices to continue the process. It will create a big combination job that includes the works of other organs such as the liver, pancreas, and the gall bladder. The first hormones that released from the small intestine is the secretin which cause the pancreas to produce bicarbonate to decrease the acidic in the small intestine. Once the acidic decreases, the pancreatic juice will be produced via the pancreatic duct that contains different enzymes include Lipase that helps digest fats to fatty acids and glycerol. It produces insulin which regulates blood glucose levels. The nutrients then travel through the liver via hepatic portal vein which eliminate and removal of toxins. Bile is secreted by the liver and stored in the gall bladder, needed for the fat digestion and lipid digestion by releasing emulsify fats, allowing lipid enzymes to digest fats. So at this point, most of the chyme has been absorbed. Water, minerals, and waste products of digestion will continue to pass down to the ascending colon in the