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digestive system

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kirill Popov

on 26 October 2012

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Transcript of digestive system

By KIRILL and Samika Lewis DIGESTIVE
SYSTEM... EVERYONE HAS ONE... DO I HAVE ONE? I THINK I HAVE ONE... Yes, y The mouth is the beginning of the digestive system. When you chew your food, the saliva breaks down your food. There is something on the back of your toungue called the epiglottis. It keeps the food from going into your windpipe. An adult's stomach can hold approximately 1 liter of food. The stomach is a sac-like structure surrounded by a muscular wall that provides elasticity. The stomach can expand to hold four times its normal volume. After leaving the stomach, partially digested food--known as chime--enters the small intestine. The small intestine, the longest section of the digestive tract, is about 3.5 times the body length, according to Colorado State University. This 20-foot to 25-foot section of the digestive system is divided into three sections: the duodenum, the jejunum and the ileum. BEANS ANYONE? The noise created by passing gas is not from the two buttocks vibrating together, as many believe. The noise created occurs as the gas passes through the anal sphincter. It's influenced by a combination of the volume of gas, the force with which it's expelled and the tightness of the anal sphincter. NO THANKS!! The function of the uvula, which is the little flap you see at the back of your throat, holds the food from getting into your nose Most of us pass somewhere between 200 and 2,000 ml of gas per day Even super Mario has one. So, what is a digestive system? This is where it is. Nothing much, right? That's where you're wrong, the digestive system is a system that's gets rid of food waste, but it also gets the proteins from the food too. But where does it start???? It starts at the mouth, you know, where you chew your food and talk at the same time. Don't deny it, you've all done it before. Anyways, this is the mouth, the beginning of the process. When you chew your food, the salivary enzymes (saliva) helps break down your food by breaking down carbohydrates (starch) to make it easier to digest. Saliva come from salivary glands,. Also, at the back of your tongue is a thing called the epiglottis, which keeps the food from going into the windpipe. This is the esophagus, the next part in the process. The esophagus uses muscle movements called peristalsis to force down the food. After going through the esophagus, the munched up food goes into the stomach. Stomach acid and enzymes help strong stomach muscles mash up and churn the food until it's turned into a liquid called chyme. Okay, while the stomach's doing it's job, let's talk about something else... For the next three parts of the digestive system, Spongebob will be our example. As you can see, he's very excited. The liver (red) is an organ that creates bile. Bile is a digestive chemical breaks down fats. The liver also filters toxins from the blood and blood proteins. The gallbladder (green) stores and releases bile into the small intestine. The pancreas produces enzymes that helps break down proteins, carbohydrates, and fats. This is a random picture I found of pancreas cancer. :'( Spongebob went back to the Krusty Krab, moving on... This person likes to walk... In the small intestines, the chyme goes into further break down. Your small intestines have a lining on the inside of them called villi. The villi absorbs nutrients from the food for the rest of your body. The villi!!!!! Last but not least... Man he's good at archery.. I mean, large intestines! The large intestines is the last part of the process. When the the food goes into the large intestines, some of the water and electrolytes (things like sodium) are taken away from the food. Many microbes help through the digestion process. Then the food goes all the way around until the solid waste enters the rectum until it leaves the body through the anus. Well, that's all! BYE!!!
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