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Introduction to digestive system research paper
Chapter 22 the digestive system
Introduction to digestive system research paper
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Overview of the Digestive System
The purpose of the digestive system is to hydrolyze macromolecules to their smallest subunits. The organs of the digestive system are located within the GI tract. The digestive track is made up of a series of hollow organs joined in a long, twisting tube from the mouth to the anus.
The process of digestion requires ingestion, digestion, movement, absorption, and elimination. All parts of the tract have four layers. These layers surround the lumen, or interior space of the GI tract.
Two “solid” digestive organs, discussed in the latter units of this chapter are the liver and the pancreas, produce digestive juices that reach the intestine through small tubes called ducts. The gallbladder stores the liver 's digestive juices until they are needed in the intestine. Parts of the nervous and circulatory systems also play major roles in the digestive system.
What Is Digestion?
Food and drink must be changed into smaller molecules of nutrients to be absorbed into the blood and carried to cells throughout the body. Digestion is the process by which food and liquid are broken down into smaller parts so that the body can use them to build and nourish cells, and to provide energy. Digestion involves the mixing of food, the movement of food through the digestive tract, and a chemical breakdown of large molecules of
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The small intestine averages at about 6m. (18 ft.) in length, contains a wide range of enzymes to digest carbohydrate, protein, and fat content of food, 90% of the digestive system. Surface area of the intestine is approximately the size of a tennis court. Most of the enzymes are secreted by the pancreas and enter via a duct at the duodenum. Pancreatic amylase begins the digestion of carbohydrates. The wall of the intestine absorbs sugar, amino acid, glycerol, and fatty acids. Lactose intolerants do not have the brush border enzymes of the small intestine, which completes the
During digestion, the body breaks down food into smaller molecules that could then be used by the body’s cells and tissues in order to perform functions. This starts off in the mouth with the physical movements of chewing and the chemical breakdown by saliva. Enzymes in the stomach break food down further after traveling from the mouth through the esophagus. The food from here then moves into the small intestine, where pancreatic juices and enzymes dissolve proteins, carbohydrates, and fibers, and bile from the liver breaks down fats into these small molecules. Any portion of the fibers or food that were unable to be broken down are passed from the small intestine to the large intestine, which is where the digestive tract transitions into the excretory tract, then the colon and out of the rectum. Any liquids that have been stripped of their nutrients by the body proceed from the stomach to the kidneys. In the kidneys, sodium ions (Na+), uric acid, and urea are exchanged with water, which moves urinary bladder and is excreted through the
Gastrointestinal tract (GIT) is the portal through which nutritive substances; vitamins, minerals and fluids enter the body. The digestive tract is more than 10 metres long from one end to the other. It is continuous starting from the mouth, passing through the pharynx and the oesophagus, to the stomach, the small and large intestines, ending in the rectum, and finally into the anus. The GI tract is divided into two main sections: the upper GI tract and the lower GI tract. Upper GIT includes the mouth, pharynx, oesophagus and stomach. The lower GI tract includes the small and large intestines and anus. The accessory organs of digestions are the gallbladder, liver and pancreas. Diseases that may occur in upper and lower GIT can be divided as oesophageal diseases, gastric diseases and intestinal diseases.
•The forty five year old patient is diagnosed with the progressive cirrhosis inflaming the liver along with the parenchymal cells. The plain symptoms is manifested primarily because of the augmentation of edema internally in the lower abdomen.
As the digestive system breaks down your food, after it's broken down it turns into energy. Your circulatory system takes some the produced energy and transports it around the body, delivering it and other blood, nutrients, oxygen, and more compounds to every cell in your body. The digestive depends on the circulatory as much as it does vice versa because they need the blood, nutrients, and energy (broken down food) that was produced from both systems. Many digestive organs need to use about 30% of cardiac output. Both the digestive and circulatory systems get rid of unwanted or unneeded materials (waste) and feces (poop). The vial substances are absorbed by the small intestine, where it is put into the bloodstream, so it can be circulated around the body. The most important thing is that with no nutrients and circulation, there's no life.
Ingestion is a process of consuming any product alimentary into our body. By nature the ingestion occurs through the mouth. The food we are ingesting pass throughout the stomach, where stomach acids and enzymes acting. The muscular in our stomach squeezes and mixes the food. After the food into our intestine.
The digestive system is interesting, complex and truly important to our daily lives. Without the digestive system energy and nutrients vital to the body could never reach body cells and a person wouldn't be able to do all the things they like to do, such as study, play sports, and hang out with friends. The body uses various organs and chemicals to break down food. The breakdown of food he... ...
The digestive system, in organisms like the mink and human, is supposed to break down the food being eaten to transfer into energy. This energy helps other functions of the body that would in turn keep it alive. The digestive system includes organs such as the stomach, intestines, liver, etc. Digestion starts at the mouth, though.
The digestive system otherwise known as the gastrointestinal tract (GI tract) is a long tube which runs from the mouth to the anus. It operates to break down the food we eat from large macromolecules such as starch, proteins and fats, which can’t be easily absorbed, into readily absorbable molecules such as glucose, fatty acids and amino acids. Once broken down, these molecules can cross the cells lining the small intestine, enter into the circulatory system and be transported around the body finally being used for energy, growth and repair.
Pancreas: The pancreas is an oval organ located between the stomach and the small intestine. It makes fluids to protect the small intestine from the acid. It produces important enzymes and hormones that will ...
Pancreas- The pancreas creates a juice that breaks down carbohydrates, fats, and proteins. "The pancreas delivers digestive juice to the small intestine through small tubes called ducts" (NIH (5).) The pancreas is not considered part of the GI tract, but it is a necessary organ needed for the digestion and absorption of nutrients.
http://kidshealth.org/kid/cancer_center/HTBW/digestive_system.html ( I didnt copy direct quotes, however I had used the idea of the beginning in my research on the digestive system to help the reader better understand the system)
The exocrine function of the pancreas is that it produces enzymes that aids in the digestion of food. There are three important enzymes that are crucial in helping with digestion. The first digestive enzyme is amylase. Amylase function is to break down carbohydrates. The amylase enzyme is made in two places: the cells in the digestive tract that produces saliva and the main one specifically found in the pancreas that are called the pancreatic amylase (Marie, Joanne; Media Demand, “What Are the Functions of Amylase, Protease and Lipase Digestive Enzymes”). The amylase in the pancreas passes through the pancreatic duct to the small intestines. This amylase in the pancreas completes the process of digestion of carbohydrates. Consequently, this leads to the production of glucose that gets absorbed into the bloodstream and gets carried throughout the body. The next enzyme that aids in digestion of food is protease. While amylase breaks down carbohydrates, protease breaks down protein. Protease breaks down protein into the building block form of amino acids. The three main proteases that it produces are: pepsin, trypsin and chymotrypsin (Marie, Joanne; Media Demand, “What Are the Functions of Amylase, Protease and Lipase Digestive Enzymes”). Pepsin does not occur in the pancreas but it is the catalysis in starting the digestion of proteins. Trypsin and chymotrypsin are the two proteases that occur in
Our metabolism, “the totality of an organism’s chemical reactions”, manages energy usage and production of cells. We use energy constantly and our metabolism breaks down food through complex chemical reactions into energy our cells
Most digestion occurs inside the stomach and the small intestine. The remaining product is moved through the large intestine where vitamins and water are absorbed. This is where diverticular disease occurs, along the walls of the small intestine.
The digestive system is a very important system in the human body. It is a group of organs that work together to turn food into energy and nutrients in the entire body. The food that was chewed in a humans’ mouth now passes through a long tube that is inside of the body that is known as the alimentary canal. The alimentary canal is made of the oral cavity, pharynx, esophagus, stomach, small intestines, and large intestines. Those few things are not the only important accessories of the digestive system there is also the teeth, tongue, salivary glands, liver, gallbladder, and pancreas.