digestive system essay
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. The system consists of the primary organs; the mouth, the esophagus, the stomach, the small intestine, the large intestine, the rectum, and the anus, as well as the secondary organs; the liver, the salivary glands, the gallbladder and the pancreas.
The mouth is responsible for the immediate intake of food, and is partially responsible for digestion, through the process of mastication, which is the chewing of food. Food enters the body through the mouth, where it is than chewed to soften and partially breakdown the food. Saliva from the salivary glands also aides in the preliminary breakdown of foods, because of the chemicals and enzymes contained in saliva. Once the food is sufficiently broken down, it is swallowed and brought to the next organ in the digestive system, the esophagus.
The Role of the esophagus is simply to allow the partially broken down food to travel from the mouth to the stomach. Its role in digestion is minimal, but it is still considered one of the major organs in the system. When the Cardiac sphincter fails its job, the gastric acid seeps into the esophagus, causing damage to the interior of the esophagus, as well as the painful sensation known as heartburn.
The stomach is a muscular, hollow organ in the human digestive system, and is one of the primary sites of digestion. It is filled with gastric acid, a powerful acid that breaks down food with relative ease, digesting most foods in about 4 or 5 hours. The stomach contains three glands, which are used to either aid in the digestion of food, or protection of the stomach from its own digestive materials. The three types of glands are the pyloric gland, the cardiac gland and the gastric gland. The pyloric gland is responsible for secreting gastrin, a hormone which stimulates the production of gastric acid. The gastrin activates the gastric glands, which start secreting gastric acid. The cardiac glands are the centers of mucus secretion in the stomach. This mucus is used to protect the lining of the stomach. A common problem associated with the stomach is peptic ulcers, a type of ulcer formed by a disturbance in the regulation of the hormone gastrin, which causes to much gastric acid to be produced, which causes damage to the mucus membrane and the stomach lining. After food has been digested enough, it moves out of the stomach and into the small intestine.
Another round of digestion occurs in the small intestine, even more than in the stomach. Absorption also begins to occur at this stage in the digestive system. The small intestine is broken down into three parts, the duodenum, the jejunum, and the ileum. The duodenum is the first part of the small intestine, and it is responsible for most of the food digested in the small intestine. The duodenum also regulates the rate of emptying of the stomach via hormonal pathways. The next part of the small intestine is the jejunum, which is the longest portion of the small intestine, but it is also responsible for very little digestion, but is primarily responsible for the first round of absorption, where it takes most of the nutrients out of the food matter. The final portion of the small intestine is the ileum, which is where the final bit of absorption in the small intestine takes place. Once the now digested material finishes its path through the small intestine, it enters the large intestine.
The large intestines primary purpose is to remove most of the water from the now indigestible mass, and move it to the anus, where it will be removed from the body. The large intestine is made up of the cecum, the rectum and the colon. The cecum is not very large in humans, and is barely existent at all. It serves a much higher purpose in herbivores, where it digests tough leaves with the help of symbiotic bacteria. The colon is where the water is taken from the digested food matter. The rectum is where the waste is temporarily stored before it is excreted from the body, which takes place in the anus.
The secondary organs in the digestive system are also vital to the survival of a human, but they take a more passive role in digestion. It lies below the diaphragm in the thoracic region of the abdomen. It produces some of the system's bile the rest is produced by the gallbladder, an alkaline compound which aids in digestion. It also performs and regulates a wide variety of high-volume biochemical reactions requiring highly specialized tissues, including the synthesis and breakdown of small and complex molecules, many of which are necessary for normal vital functions.
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The mouth is responsible for the immediate intake of food, and is partially responsible for digestion, through the process of mastication, which is the chewing of food. Food enters the body through the mouth, where it is than chewed to soften and partially breakdown the food. Saliva from the salivary glands also aides in the preliminary breakdown of foods, because of the chemicals and enzymes contained in saliva. Once the food is sufficiently broken down, it is swallowed and brought to the next organ in the digestive system, the esophagus.
The Role of the esophagus is simply to allow the partially broken down food to travel from the mouth to the stomach. Its role in digestion is minimal, but it is still considered one of the major organs in the system. When the Cardiac sphincter fails its job, the gastric acid seeps into the esophagus, causing damage to the interior of the esophagus, as well as the painful sensation known as heartburn.
The stomach is a muscular, hollow organ in the human digestive system, and is one of the primary sites of digestion. It is filled with gastric acid, a powerful acid that breaks down food with relative ease, digesting most foods in about 4 or 5 hours. The stomach contains three glands, which are used to either aid in the digestion of food, or protection of the stomach from its own digestive materials. The three types of glands are the pyloric gland, the cardiac gland and the gastric gland. The pyloric gland is responsible for secreting gastrin, a hormone which stimulates the production of gastric acid. The gastrin activates the gastric glands, which start secreting gastric acid. The cardiac glands are the centers of mucus secretion in the stomach. This mucus is used to protect the lining of the stomach. A common problem associated with the stomach is peptic ulcers, a type of ulcer formed by a disturbance in the regulation of the hormone gastrin, which causes to much gastric acid to be produced, which causes damage to the mucus membrane and the stomach lining. After food has been digested enough, it moves out of the stomach and into the small intestine.
Another round of digestion occurs in the small intestine, even more than in the stomach. Absorption also begins to occur at this stage in the digestive system. The small intestine is broken down into three parts, the duodenum, the jejunum, and the ileum. The duodenum is the first part of the small intestine, and it is responsible for most of the food digested in the small intestine. The duodenum also regulates the rate of emptying of the stomach via hormonal pathways. The next part of the small intestine is the jejunum, which is the longest portion of the small intestine, but it is also responsible for very little digestion, but is primarily responsible for the first round of absorption, where it takes most of the nutrients out of the food matter. The final portion of the small intestine is the ileum, which is where the final bit of absorption in the small intestine takes place. Once the now digested material finishes its path through the small intestine, it enters the large intestine.
The large intestines primary purpose is to remove most of the water from the now indigestible mass, and move it to the anus, where it will be removed from the body. The large intestine is made up of the cecum, the rectum and the colon. The cecum is not very large in humans, and is barely existent at all. It serves a much higher purpose in herbivores, where it digests tough leaves with the help of symbiotic bacteria. The colon is where the water is taken from the digested food matter. The rectum is where the waste is temporarily stored before it is excreted from the body, which takes place in the anus.
The secondary organs in the digestive system are also vital to the survival of a human, but they take a more passive role in digestion. It lies below the diaphragm in the thoracic region of the abdomen. It produces some of the system's bile the rest is produced by the gallbladder, an alkaline compound which aids in digestion. It also performs and regulates a wide variety of high-volume biochemical reactions requiring highly specialized tissues, including the synthesis and breakdown of small and complex molecules, many of which are necessary for normal vital functions.
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The digestive system is the the group of organs that changes food to
carbohydrates, fats, and proteins and used by our body. Digestion takes places begins form our mouth and ends with our anus. the function of our digestion system are to ingest food, digest into nutrients, cross our plasma membranes, absorb nutrients and eliminate indigestible remains. our stomach is our main organ because it mixes the food and breaks down into unis the can be taken into carbohydrates, fats and proteins which can be used by us . There are different parts of main organs of our digestive system, esophagus, stomach, large intestines, small intestine, liver, pancrea and finally our anus. As our digestion begins in our mouth, the food is cut an dchopped by our teeth. Our tongue helps mix the food with saliva so it can be swallowed easily. From our mouth, the food is swalllowed into a transportube called esophagus. Esophagus actually carried food to our stomach, through before that there is a flap called epiglottis which is an air passage and the foodpassage in the pharynx. when you swallow, the air passage will automatically blocked by itself so the food won't enter the esophagus though Our stomach is shaped as a J- shaped organs, when food is present, the stomach will mixing food with gastric juice, after that it will churns for into a liquid called chyme, and it will leaves the stomach enters the intestine. the small intestine is a longest part of our digestive tract of human. food remains in the small intestine for several hours. Two large galnds are the liver and the pancreas, which connect with the smallintestine by ducts or tubes. Fluid from the ancreas is called pancreatic juice. fluid from the liver is called bile. bile is stored in the gallblader helps digest carbohydrates, proteins and fats. .
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carbohydrates, fats, and proteins and used by our body. Digestion takes places begins form our mouth and ends with our anus. the function of our digestion system are to ingest food, digest into nutrients, cross our plasma membranes, absorb nutrients and eliminate indigestible remains. our stomach is our main organ because it mixes the food and breaks down into unis the can be taken into carbohydrates, fats and proteins which can be used by us . There are different parts of main organs of our digestive system, esophagus, stomach, large intestines, small intestine, liver, pancrea and finally our anus. As our digestion begins in our mouth, the food is cut an dchopped by our teeth. Our tongue helps mix the food with saliva so it can be swallowed easily. From our mouth, the food is swalllowed into a transportube called esophagus. Esophagus actually carried food to our stomach, through before that there is a flap called epiglottis which is an air passage and the foodpassage in the pharynx. when you swallow, the air passage will automatically blocked by itself so the food won't enter the esophagus though Our stomach is shaped as a J- shaped organs, when food is present, the stomach will mixing food with gastric juice, after that it will churns for into a liquid called chyme, and it will leaves the stomach enters the intestine. the small intestine is a longest part of our digestive tract of human. food remains in the small intestine for several hours. Two large galnds are the liver and the pancreas, which connect with the smallintestine by ducts or tubes. Fluid from the ancreas is called pancreatic juice. fluid from the liver is called bile. bile is stored in the gallblader helps digest carbohydrates, proteins and fats. .
hope it helps u plzzzzzzzzzzzzzzzzz mark my ans as brainelist if helpful happy new year
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