The Stomach And Digestive System - Free Essay Example

I have selected the Stomach as the digestive organ Ill be talking about with you today. Here Ill go through 4 sections describing the Stomach, also its features. The first section will be about how the organ works helping your body digest and/or absorb the food you eat. Next will be a statement on what jobs and roles this specific organ has. Then well discuss what enzymes or hormones are made and used by the organ and what happens there. Lastly why is the organs importance to the body.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   For the stomach to effectively and efficiently digest, the Upper muscle in the stomach relaxes to let food in. Then a muscle below it vibrates and mixes food with digestive juices. After food enters the stomach for around twenty to fifteen minutes, the action of saliva continues. That would be the conversion of starchy foods to maltose. The gastric juice by that time will secrete in a adequate amount and will be mixed with the food. When food in the stomach starts looking acidic by a digestive fluid formed in the stomach and is made up of hydrochloric acid, potassium chloride and sodium chloride, the action of ptyalin( a form of amylase found in the saliva of humans and some other animals) stops, because it can act only upon alkaline medium. Then an action of the digestive enzymes( which break down molecules like fats, proteins and carbs into even smaller molecules that can be easily absorbed)are available in gastric juices and they become active on acidi c medium. This is how the organ works help your body digest.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The Stomach has a few jobs in the digestive system and some would be like to absorb all the body needs out of what was consumed as well as, terminating whats not needed, being, Secretes acid and enzymes that digest food. Ridges tissue which is apart of a muscle in the stomach is called Rugae which lines the stomach. The stomach contracts periodically, moving about vigorously for food to enhance digestion. The pyloric sphincter is a muscular valve that opens to allow food to flow from the stomach to the small intestine. Like a train station and youre the food, waiting for your Train. The role of this digestive organ works like a train station until the pyloric sphincter opens.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Enzymes and hormones produced by the stomach. The stomach can make Protease (e.g. Pepsin), gastrin, and Cholecystokinin. The protein digesting enzyme pepsin is triggered by vulnerability to hydrochloric acid within the stomach. Chief cells are also found in the gastric pits within the stomach, and produce two digestive enzymes named pepsinogen and gastric Lipase. Gastrin is a peptide hormone that supports development and increased activity in secretion of gastric acid by parietal cells in the stomach and aids in gastric motility. It is released by G cells in the pyloric antrum of the stomach, duodenum, and the pancreas. Cholecystokinin is a peptide hormone of the gastrointestinal system obligated to encourage the digestion of fat and protein. Also Cholecystokinin, is stimulated by the introduction of hydrochloric acid, amino acids, or fatty acids inside the stomach or duodenum. These are the enzymes and hormones used by this organ.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   The stomach is important because it manufactures and releases several substances to control the digestion of food. Each of these substances is made by exocrine or endocrine cells found in the mucosa. The main exocrine product of the stomach is gastric juice mixed up of hydrochloric acid, Mucus and digestive enzymes. The stomach is a gate keeper of what can enter our bodies. As well as what can exit them.   Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚  Ã‚   Without the stomach it would be Everything is in and out with no delay. Or itd be like the saying,   in one ear out the other but instead itd be   in your top hole. Out your bottom hole..