Gastrointestinal Anatomy And Physiology Pdf

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gastrointestinal anatomy and physiology pdf

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The function of the digestive system is to break down the foods you eat, release their nutrients, and absorb those nutrients into the body. Although the small intestine is the workhorse of the system, where the majority of digestion occurs, and where most of the released nutrients are absorbed into the blood or lymph, each of the digestive system organs makes a vital contribution to this process. Figure 1.

If your institution subscribes to this resource, and you don't have a MyAccess Profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus. Please consult the latest official manual style if you have any questions regarding the format accuracy. The gastrointestinal system consists of the gastrointestinal tract and the accessory exocrine glands. The gastrointestinal tract includes the mouth, the esophagus, the stomach, the small intestine, and the large intestine. The major accessory glands are the salivary glands, the liver, the gallbladder, and the pancreas.

Basic Anatomy and Physiology of the Gastrointestinal Tract

The gastrointestinal tract GIT consists of a hollow muscular tube starting from the oral cavity, where food enters the mouth, continuing through the pharynx, oesophagus, stomach and intestines to the rectum and anus, where food is expelled. There are various accessory organs that assist the tract by secreting enzymes to help break down food into its component nutrients. Thus the salivary glands, liver, pancreas and gall bladder have important functions in the digestive system. Food is propelled along the length of the GIT by peristaltic movements of the muscular walls. Information on re-publishing of our images. The primary purpose of the gastrointestinal tract is to break food down into nutrients, which can be absorbed into the body to provide energy.

The gastrointestinal tract begins at the mouth and ends at the anus Fig. Its purpose is to mechanically and enzymatically digest food, absorb nutrients and water, protect the body from microbial invasion, and expel feces. Food enters the mouth where mechanical and enzymatic digestion begins and then is propelled down the esophagus and into the stomach where digestion continues. As the food bolus passes through the small intestine, further digestion and absorption take place with the help of enzymes secreted by the stomach, small intestine, liver, and pancreas. The majority of water absorption and formation of feces occur in the large intestine, until it is temporarily stored in the rectum and defecated through the anus [1]. Skip to main content. This service is more advanced with JavaScript available.

The gastrointestinal system is responsible for the breakdown and absorption of various foods and liquids needed to sustain life. The new edition is a highly referenced and useful resource for gastroenterologists, physiologists, internists, professional researchers, and instructors teaching courses for clinical and research students. Clinical gastroenterologists, physiologists, and internists, as well as, professional researchers in gastroenterology, physiology, internal medicine, translational medicine and biomedicine. Chapter He serves as a reviewer on a variety of NIH, VA and other national study sections as well as international European study sections dealing with medical research in internal medicine and nutrition.

Physiology of the Gastrointestinal Tract, Two Volume Set

If your institution subscribes to this resource, and you don't have a MyAccess Profile, please contact your library's reference desk for information on how to gain access to this resource from off-campus. Please consult the latest official manual style if you have any questions regarding the format accuracy. Understand the basic functions of the gastrointestinal system and the design features that subserve these Describe the functional layers of the gastrointestinal tract and the specializations that contribute to function Glands Epithelium Mucosa Muscle Sphincters Identify the segments of the gastrointestinal tract and the specialized functions attributed to each Understand the circulatory features of the intestine and variations that occur after meals Describe the basic anatomy of the neuromuscular systems of the gut. The gastrointestinal system primarily conveys nutrients, electrolytes, and water into the body. In unicellular organisms, metabolic requirements can be met by diffusion or transport of substances from the environment across the cell membrane. However, the greatly increased scale of multicellular organisms, along with the fact that most such organisms are terrestrial, and thus not normally swimming in a soup of nutrients, means that specialized systems have evolved to convey nutrients into and around the body. Thus, the gastrointestinal system and liver work in concert with the circulatory system to ensure that the nutritional requirements of cells distant from the exterior of the body can be met.


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Gastrointestinal system anatomy

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Gastrointestinal Anatomy and Physiology (1st Edition) PDF Free Download

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Gastrointestinal system anatomy

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    The functions of the gastrointestinal tract and its accessory organs are essential for life. The process of digestion supplies nutrients to each and every cell in our.

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