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The Digestion System: Going Down, Down, Down...
Transcript of The Digestion System: Going Down, Down, Down...
About 4 hours later...
Whooo, that was long! Finally though, I reach the tip and bottom of the stomach, where the pyloric valve is located. When contracted, the valve holds the stomach contents in the stomach, allowing the digestive juices of the stomach to break them down into a substance known as chyme. When the chyme, the food after the stomach's job is ready, the valve opens, allowing it to pass into the duodenum for the next stage of the digestive process, the Small Intestine, where bile takes off. But first, before my chyme self goes any further where does bile come from...?! Down the Esophagus, and in the Stomach! Living with Your Liver Well hello, I am just a burrito named Bean Burrito. I lived a good life you know, made by mexicans on a mexican grill (not Rubio's) when someone packaged me in a napkin and placed me on a plate, I was blinded by a huge hand and grabbed to be eaten. Petrified, I tried to squirm out, but too late. I could see the light. I could see the teeth, tongue, uvula. I knew it was time. I mean, I was cooked for that, you know. It was time to digest. Wow, so much action in the mouth! After all, it is the beginning of the Digestive System. These teeth are grinding me and chewing me up. Last time I heard, this was called mechanical digestion, which is breaking down food with physical action. Like an action movie. I'm turning into mush! Oh no! The salivary amylase is
coming out the salivary glands and covering me
over with it's load of enzymes,
chemicals that turn large
molecules into small ones (easier
to digest small food), starting another type of digestion, chemical digestion, the breakdown of food using chemicals. Uh oh, the tongue is pushing me back, I'm leaving the mouth and going to the big boys, downwards to darkness. Down, down, down...SQUEEZE! http://www2.massgeneral.org/cancerresourceroom/types/thoracic/illustrations/esophagus_front.asp http://www.webmd.com/digestive-disorders/picture-of-the-stomach http://www.brainpop.com/health/bodysystems/digestivesystem/ If you guessed the liver, you are correct. The liver in this body (and all others) produces a type of digestion chemical known as bile, which helps the Small Intestine, which I will reach later, digest my chyme self, the terminology of the milk-shake like food I look like after I leaves the stomach. It also functions as a filter for your blood which eliminates any toxins in a process called detoxification. Also, the liver is the only organ that can regenerate. It is the "storage of energy" because there it contains carbohydrates. Good thing this man isn't an alcoholic because if he was and drank excessively, he might damage his liver and get Cirrhosis, a raw, scarred liver that starts to defunction. Not good. Anyway, I don't know if the image shows it, but under the liver is located the Pancreas... Pleasing Pancreas Now, aside from everything else, at about 6 in. long, the Pancreas has it's own function of breaking down my proteins, carbohydrates, and fats which then takes it to the liver. The Pancreas also produces and discharges hormones that affect the level of sugar in the blood. there are also these special cells called Islets of Langerhans that discharge Glucagon, which raises the level of glucose(sugar), Insulin, which make cells to take glucose, and Somatostatin, which balances the production of glucagon and insulin. In cases where someone has Pancreatitis, it is a little difficult to notice due to it's complex position in the upper abdomen and adjacent to the small intestine, it lies toward your back. The Small (Not So Small!) Intestine Now, resuming my account in this man's digestive body system, I travel through the small intestine where most of the absorption of food takes place. As travel through this nearly 7 meter journey I'm getting tickled and being brushed by villi, small finger like tubes that basically absorb and trap the nutrients inside me. The blood vessels in the villi then transport my nutrients on the surface of the blood cells. I'm sure a big help in the vitamins and nutrients in me. Well, I hope this is going as planned. Where might I end up next... And Finally, the Large Intestine http://en.wikipedia.org/wiki/Liver http://www.montana.edu/wwwai/imsd/alcohol/Vanessa/vwpancreas.htm http://www.brainpop.com/health/bodysystems/digestivesystem/ http://en.wikipedia.org/wiki/Small_intestine Woooohoooo! I'm almost done here! As I enter in the Large Intestine, or Colon, I'm a thin watery piece of mass. This intestine isn't longer than the Small Intestine, but it's wider, which is where it got it's name. Inside here is so warm and moist, pretty ideal for microbial growth and free of bacteria killing acids. I think these microbes, small organisms, are metabolizing my nutrients. Did you know that when this happens, it's when you occasionally pass gas (Flatulence). Cool, huh? Oh well. Wait.. I think this thing is drying me out with my water in me. Wait, isn't this process called Absorption? Yes yes. Wow, I think I just slid in the rectum where all I am is solid waste now. Well, this has been a wonderful journey and I wish you my dearest fibers. Off to the fish and sea now, later! http://www.healthcentral.com/acid-reflux/h/digestive-system---large-intestine-diagram.html Mouth: Chewed food Esophagus: Stomach: Soft, mushy food Liver: Blood to filter Small Intestines Chyme The liver sends Bile to the small intestine The small intestine sends carbohydrates and other nutrients Large Intestine: The Large Intestine sends water and blood A thin, wet waste Rectum and Anus Solid Waste Summary of Whole Digestive Project