Anatomy and physiology of gastrointestinal tract pdf

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anatomy and physiology of gastrointestinal tract pdf

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As adults, we know that a healthy digestive system is essential for good health because it converts food into raw materials that build and fuel our body cells.

The stomach is a muscular, J-shaped organ in the upper part of the abdomen. It is part of the digestive system, which extends from the mouth to the anus. The size of the stomach varies from person to person, and from meal to meal.

Quick Anatomy Lesson: Human Digestive System

The human digestive system, also known as the digestive tract, the GI tract, the alimentary canal is a series of connected organs leading from the mouth to the anus.

The digestive system allows us to break down the food we eat to obtain energy and nourishment. The digestive system -- which can be up to 30 feet in length in adults -- is usually divided into eight parts: the mouth, the esophagus, the stomach, the small intestine or "small bowel" and the large intestine also called "large bowel" or "colon" with the liver, pancreas, and gallbladder adding secretions to help digestion.

These organs combine to perform six tasks: ingestion, secretion, propulsion, digestion, absorption, and defecation. The mouth starts the process by ingesting and mechanically breaking down the food we eat into a swallowable form, adding some early secretions to start the process of digestion. The esophagus is the muscular tube connecting the mouth to the stomach. A ring-like muscle at the end of the esophagus controls the passage of food into the stomach. This ring-like muscle also controls the food from going back up into the esophagus.

The stomach then further liquefies the food and adds digestive acids. From there the stomach contents are slowly released into the small intestine. The small intestine is where most of the digestion and absorption of nutrients takes place. There are millions of tiny finger-like projections lining the small intestine called villi pronounced: "VILL-ee".

These villi aid in the absorption of nutrients. Secretions from the liver, pancreas, and gallbladder are emptied into the small intestine and also aid in the digestive process. After traveling through the nearly 20 feet of small intestine, unabsorbed material moves into the colon large bowel or large intestine.

Here the remaining liquids and salts electrolytes are absorbed from the digested material. Bacteria further break down the undigested material, which continues to solidify and eventually passes from the body as feces through the rectum and anus during a bowel movement. Media Backgrounder Quick Anatomy Lesson: Human Digestive System The human digestive system, also known as the digestive tract, the GI tract, the alimentary canal is a series of connected organs leading from the mouth to the anus.

Reviewed August

Physiology of the Gastrointestinal Tract, Two Volume Set

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. He is also a member of Editorial Boards of a number of prestigious medical research journals.

The function of the digestive system is digestion and absorption. Digestion is the breakdown of food into small molecules, which are then absorbed into the body. The digestive system is divided into two major parts:. The treatment of food in the digestive system involves the following seven processes:. Propulsion is the movement of food along the digestive tract. The major means of propulsion is peristalsis, a series of alternating contractions and relaxations of smooth muscle that lines the walls of the digestive organs and that forces food to move forward.

Basic Anatomy and Physiology of the Gastrointestinal Tract

The human digestive system, also known as the digestive tract, the GI tract, the alimentary canal is a series of connected organs leading from the mouth to the anus. The digestive system allows us to break down the food we eat to obtain energy and nourishment. The digestive system -- which can be up to 30 feet in length in adults -- is usually divided into eight parts: the mouth, the esophagus, the stomach, the small intestine or "small bowel" and the large intestine also called "large bowel" or "colon" with the liver, pancreas, and gallbladder adding secretions to help digestion. These organs combine to perform six tasks: ingestion, secretion, propulsion, digestion, absorption, and defecation.

Digestive System Anatomy and Physiology

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.

5th Edition

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on May 29, Study location of organs, reasons for location, and shape. Anatomy is the science which deals with the description of the structure of cells, tissues, organs and organisms.

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  • Harm reduction guide to coming off psychiatric drugs pdf unlocking the power of opnet modeler pdf Dafna M. - 29.03.2021 at 02:14
  • The functions of the gastrointestinal tract and its accessory organs are essential Understanding the anatomy and physiology of the gastrointestinal system is. Lingbatimont - 02.04.2021 at 21:38

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