...Assignment: Human Digestion Summary Suehaydee Figueroa SCI/241 NUTRITION Professor Tiera Pack Lawyer March 21, 2013 The human digestive system is a complex series of organs and glands that processes food. In order to use the food we eat, our body has to break the food down into smaller molecules that it can process; it also has to excrete waste. Most of the digestive organs (like the stomach and intestines) are tube-like and contain the food as it makes its way through the body. The digestive system is essentially a long, twisting tube that runs from the mouth to the anus, plus a few other organs (like the liver and pancreas) that produce or store digestive chemicals. The start of the process starts with the mouth. The digestive process begins in the mouth. Food is partly broken down by the process of chewing and by the chemical action of salivary enzymes. These enzymes are produced by the salivary glands and break down starches into smaller molecules. On the way to the stomach: the esophagus - After being chewed and swallowed, the food enters the esophagus. The esophagus is a long tube that runs from the mouth to the stomach. It uses rhythmic, wave-like muscle movements (called peristalsis) to force food from the throat into the stomach. This muscle movement gives us the ability to eat or drink even when we're upside-down. In the stomach - The stomach is a large, sack-like organ that churns the...
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...altogether) Spend a long time to digest their food E.g : snake 7 8 Mouth Esophagus Stomach Large intestine Rectum Anus Tongue Glands in mouth that make saliva Pancreas Liver Gallbladder 9 The mammalian digestive system consists of an alimentary canal and accessory glands that secrete digestive juices through ducts Mammalian accessory glands are the salivary glands, the pancreas, the liver, and the gallbladder 10 Stages of Food Processing Ingestion is the act of eating Digestion is the process of breaking food down into molecules small enough to absorb In chemical digestion, the process of enzymatic hydrolysis splits bonds in molecules with the addition of water Absorption is uptake of nutrients by body cells Elimination is the passage of undigested material out of the digestive compartment 11 Fig. 41-7 Small molecules Pieces of food Mechanical digestion Chemical digestion Nutrient (enzymatic hydrolysis)...
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...Human Digestion Summary SCI/241 December 6, 2014 Human Digestion Summary Digestion is the action in which the body breaks down food into molecules that can be used for substance to nourish the body. There are different organs in the body that are involved in the digestion process. These organs include; the mouth, the esophagus, the stomach, small intestines, liver and large intestine. Each one of these organs plays a significant you in the body’s digestion process (Shifko, 2014). The digestion process starts before the food actually enters the mouth. The smells that are inhaled from the food cause the mouth to produce saliva, which contains the compounds and enzymes that start to break down the food after it has entered the mouth. The food is then chewed down in to small particles so that the saliva and the enzymes can go to work. After the food is chewed it is then swallowed and starts to pass down the esophagus. According to the Cleveland Clinic, the esophagus is a muscular tube that transports the food that has been chewed to the stomach. In order for the food to be carried down the esophagus and to the stomach there are a series of contractions performed by the esophagus, this process is known as the peristalsis (Shifko, 2014). Once in the stomach, there are two different functions that must take place during the digestion process. The stomach resembles a large pouch with muscular walls. The wall of the stomach is where the food is held and it also acts...
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...Colon-located under the pancreas and above the small instestine. Parotid Salivary Gland- Ascending Colon Descending Colon Stomach- is located next to the liver and under the diaphragm. Propulsion, chemical digestion, mechanical digestion, absorption Pharynx- is located behind the tongue Small Intestine-is located above the rectum and next to the appendix. Propulsion, chemical digestion, mechanical digestion, absorption Large Intestine-Propulsion, chemical digestion, absorption Anal Canal Liver-is located under the diaphragm and above the gall bladder. Rectum-is located under the small intestine Mouth-Propulsion, chemical digestion ,mechanical digestion Propulsion-the act of propelling. Once food is chewed and mixed with saliva, it is propelled down the esophagus. To propel is to move the food substance from one point to another point in the digestive process. Absorption-to take something in through the skin or intestine. When we eat, the food is absorbed through the cells and bloodstream . Mechanical digestion-aspect of digestion through mechanical mechanisms or movement. Mechanical digestions begins when we begin to chew our food, and continues as the food substance is moved from different parts of the body and digestion process. Chemical digestions-aspect of digestion achieved with the use of chemicals to our food. Induction of chemicals begin as soon as we begin to chew or food, and continue to be introduced as the food moves from the esophagus into the stomach...
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...Human Digestion The human body goes through many stages in order to fully digest food. The amount of time it takes to digest food varies from person to person. it also depends on many factors, including its fat and protein content, the degree of muscle action of the emptying stomach and the next organ the stomach contents with pass through. The entire process can take from 24 to 72 hours to complete. Foods that contain high amounts of fiber and probiotics helps to promote the digestion process. For example, papaya, pineapple, avocado and chili peppers all aide in digestion. Digestion occurs differently depending on the part of the food is in. Digestion first begins in the mouth. Once food enters the mouth, saliva is activated from the salivary glands. Saliva helps by moistening food, breaking down molecules, and it helps to prevent tooth decay. Then, the chewing begins. In addition to saliva, it helps to mix the food around and break them into smaller pieces so swallowing is easier p(g. 71, 2012). In the stomach, food is mixed together by acidic stomach secretions in order to form a liquid-like food mass that is also known as chyme. Thanks to gastric juice , most of the bacteria in your food is killed and protein be digested. Some substances are digested while in the stomach, but there aren't many substances that can be absorbed in this part of the body (pg. 73, 2012). The digestion process in the small intestine takes place...
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...Human Digestion System “The digestive system is a group of organs working together to convert food into energy and basic nutrients to feed the entire body” (Taylor). The process of digestion begins when food enters your mouth. Using your teeth to chew the foods in to small pieces and then mixing with saliva, your tongue pushes the food down the throat or pharynx. The saliva in your mouth moistens the food and contains salivary amylase that breaks down carbohydrates into simple carbohydrates. From the pharynx the food travels down the esophagus through the cardiac spincter to the stomach. The cardiac spincter is a ring located at the top of the stomach that opens when swallowing then closes again to trap food in the stomach. Taylor notes that the stomach contains hydrocloric acid and digestive enzymes that continues the digestion of food (2010). Hydrocloric acid kills the bacteria in food and begins to chemically break down food. From the stomach the food passes to the small intestion where 90% of the digestion of nutrients takes place. The liver produces bile and secretes it into the small intestion which then combines with digestive chemicals from the pancreas to complete the digestive process with chemical digestion of foods. A mixture of digestive juices from the pancreas digests protiens, nucleic acid, lipids and charbohydrates. By the time the food has left the small intestines, all of the nutrients have been reduced into chemical building blocks and absorbed into the system...
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...GVT Task 2 A. 1. Labels of digestive organs A. 2. The function of digestive organs The mouth is the beginning of the digestive process. As food enters the mouth, the teeth begin breaking down the food and mixing with the saliva. The mouth functions in the beginning of the digestive process. The teeth begins to breakdown the food particles and mixes with the saliva. From the mixture of food and saliva travels to the stomach. The stomach begins to secrete gastric enzymes that combine with the food. As the food continues through the duodenum The stomach receives the food particles and begin to mix with the gastric juices to further breakdown the food. The liver The gallbladder Duodenum Jejenum Ascending Colon A. 3. Summarization of mechanical and chemical digestion Mechanical Digestion - Food is crushed and liquefied by the teeth, tongue, and peristaltic contractions (waves of involuntary muscle contraction) of the stomach and small intestine. This creates a greater surface area for the digestive enzymes to work upon. Chemical Digestion - Many glandular structures, dispersed throughout the body, are involved in breaking food into simple molecules that can be absorbed. In the mouth, the salivary glands produce saliva, which both lubricates food and begins the process of starch digestion. Saliva contains salivary amylase (ptyalin), an enzyme that digests starch to maltose (a disaccharide). As food leaves the mouth, the esophagus conducts it to...
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...Digestive System The digestive process is important in maintaining the lives of living organisms and in providing them with needed energy. Groups of organs, such as the mouth, esophagus, stomach, and intestines, work together to perform this complex task. Digestion is the process of breaking down food from large molecules into small ones to make it easier for absorption. The three major steps involved in the digestive process are ingestion, digestion, and absorption. Ingestion, which occurs in the mouth, is the first step of the digestive process. After food enters the mouth, the teeth chew it. Saliva, which is produced by the salivary glands, plays a major role in breaking down the food into smaller pieces. These small pieces travel to the stomach through the esophagus. In the stomach, the second step of the digestive process begins. When the chewed food reaches the bottom of the esophagus, a valve lets the food enter the stomach. Contraction of the stomach wall mixes the food. Acidic gastric juices, which are secreted by the gastric glands in the stomach, help in mixing the food and in turning it into a partial liquid so it will have the ability to move into the small intestine.In the small intestine, enzymes are secreted, and digestion is completed. The last step in the digestive process is absorption. Absorption takes place in the small intestine. The wall of the small intestine is lined with small, finger like projections called villi. Small molecules...
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...Digestion is the process of turning the food you eat into nutrients, which the body uses for energy, growth and cell repair needed to survive. Food and drinks have to be changed from large insoluble molecules into smaller insoluble molecules before the blood absorbs them and carries them to cells throughout the body. An example of a large insoluble molecule into a small insoluble molecule, is starch which is broken down into glucose. The body breaks down the nutrients from foods and drinks into carbohydrates, fats, proteins and vitamins. The digestion process starts from the mouth when you take a bite of food. This part of digestion is called mechanical digestion. Mechanical digestion is the process of breaking down food so that they can be...
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...J0hn smith University of Phoenix Human Digestion Summary Sc1241 Describe digestion in the mouth Digestion of food in the mouth start the process from the time the food touches your lips down to your stomach. When you have food in your plate and ready to eat, first thing that happens you see the food, then you can smell the food depend of what kind of food it is. Then you put the food in your mouth your saliva glands begin the digestive process as it moistened by saliva, the tongue helps mixed the food with saliva and ids in chewing by moving the food between teeth and masticated by the teeth, then the food transform into a bolus which is a mass of food that has been chewed at the point of swallowing. Once the bolus leaves your mouth, the food moves into the pharynx so it could be swallowed, then the bolus moves into the esophagus, which connects to the stomach. Describe digestion in the stomach Digestion in the stomach start after the bolus passes the esophagus and reaches the stomach where the bolus mixed with acid secretions that transform the bolus into a semiliquid food mass that is call chime. Depend on the size of the food you ate or the kind of food you ate your stomach digest the chime in two to six hours. Describe digestion in the small intestine In the small intestine is where the majority of digestion and absorption of nutrients from food happens and it is divided in three parts, known as the duodenum, the jejunum and the ileum. Secretion...
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...Anaerobic Digestion Submitted by: Submitted on: Overview This essay studies the present status of the technology in Anaerobic Digestion in US. In the first section the general process of anaerobic digestion is described. Anaerobic Digestion is basically the decomposition of organic wastes in the absence of oxygen. A brief appraisal is provided about the current position of Anaerobic Digestion in the US energy Production. Then in the next section, the technological challenges of the Anaerobic Digestion are considered. The example of the usage of Anaerobic Digestion technology is discussed and the benefits of this technology. Also the demerits of this technology for the production of biogas are examined. Finally the current improvement in anaerobic digestion technologies in US is analyzed. Introduction The Anaerobic Digestion is defined as the biodegradation of organic material that takes place in the absence of oxygen and in the presence of anaerobic microorganisms. The whole process proceeds in the series of metabolic reactions with the help of microorganisms. The organic material which is decomposed is generally the Municipal Solid Waste (MSW). This is the waste produced by the society excluding agriculture and industrial wastes. So, the waste that comes under MSW is commercial waste like from shops, markets, stores, hotels or residential waste from houses or institutional waste from hospitals, schools. The process of anaerobic Digestion completes...
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...Assignment: Human Digestion Summary Kasey Craycraft 2/18/13 SCI/241 Human Digestion Summary The digestive system provides two main functions, absorption and digestion. The main part of the digestive system is the gastrointestinal tract also referred to as the GI tract. This runs all the way from the mouth to the anus, about thirty feet long. The GI tract is made up of the mouth, pharynx, esophagus, stomach, small intestine, large intestine and anus. The transit time is the amount of time it takes for food to pass through the length of the gastrointestinal tract. Transit time normally takes anywhere from twenty-four hours to seventy-two hours. The time it takes is affected by the composition of the diet, physical activity, emotions, medications and illness. Digestion as most know starts in the mouth. Your food is ground up by your teeth and when you are chewing your glands make saliva. Saliva is constantly produced but more is made when we are eating. The saliva softens and moistens the food in our mouth. Enzymes in the saliva help break down food so it is easier to swallow. After the mouth the food then moves through the esophagus to the stomach. By the time the food reaches the stomach it is already made into fat, protein, starch and sugar. The stomach muscles contract and relax about three times a minute. This kind of churns the food mixing it with the powerful digestive juices. This process turns food into a liquid called chime. The chime then moves through...
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...I was eating an cheeseburger and then something pop out of my mind. I wonder what happen to my cheeseburger that I just ate so I went home and seach it up. The process of mechanical digestion begins as you take your first bite of food. Your teeth carry out the first stage of mechanical digestion. Your center teeth, or incisors, cut the food into bite-sized pieces. On the either side of the incisors are sharp, pointy teeth called canines. These teeth tear and slash the food in your mouth into smaller pieces. Like mechanical digestion, chemical digestion begins in the mouth. If you take a bite of a cracker and roll it around your mouth, the crackers begins to taste sweet. It tastes sweet because a chemical in the saliva has broken down the starch in the cracker in to...
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...Let’s follow the path of a delicious ham and cheese sandwich with lettuce and pickles as it is eaten and digested! Start at the beginning and discuss the anatomical parts as well as the biochemical roles that contribute to this sandwich being turned into chemical energy. Be sure to include mechanical and chemical mechanisms, along with how they are metabolized in the body! Digestion is the chemical breakdown of food molecules into smaller molecules that can be used by various cells within the body. The breakdown is initiated when food is ingested in the mouth and specific enzymes are exposed to components within the food molecules. Digestion begins in the mouth with mastication, or chewing, performed by the teeth. The purpose of chewing is to grant the food more exposure to enzymes, therefore allowing chemical digestion to occur faster. The presence of the food in the mouth stimulates exocrine glands. This causes the mouth to secrete digestive enzymes, namely salivary amylase. These secreted enzymes aid in the breakdown of foods, officially starting the digestion process. Carbohydrates in particular are mostly broken down by salivary amylase. Salivary amylase breaks starch, a popular carb, down to maltose. This means that the bread of the ham and cheese sandwich will notably be chemically altered at this point. It is because of this that bread begins to taste somewhat sweet if it is held in the mouth for some time. Muncins, or mucous, found within saliva help hold the food...
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...Matt and Maria have now begun consuming their food, though they are most likely oblivious to the process that occurs when food is being processed in their stomach, and the various components and tools needed in order to drive it into motion. Just eating and swallowing alone use as many as 30 muscles in the human body. To begin, the mouth is where everything begins in the road to digestion. The mouth is where the teeth chomp and chew the food, in order to break it down into smaller pieces in order for swallowing. Next, the salivary glands then secrete the saliva in the mouth, which in then is able to break down the food into the starches known as dextrin and maltose. This chewed food, which is also known as bolus, begins in this preparatory...
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