anatomy and physiology of gastrointestinal system pdf

Anatomy and physiology of gastrointestinal system pdf

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Physiology of the Gastrointestinal Tract, Two Volume Set

Digestive System Organs

Overview of the Digestive System

Physiology of the Gastrointestinal Tract, Two Volume Set

This article — the fifth in a six-part series describes the physiology and functions of the large intestine, the last portion of the gastrointestinal tract, as well as common conditions of both the small and large intestine. In the large intestine — the final section of the gastrointestinal tract — absorption of water and electrolytes takes place and colonic bacteria complete the process of chemical digestion. The large intestine is also where faeces are formed from the remains of food and fluid combined with by-products of the body. Intestinal content is pushed back and forth by haustral contractions and antiperistaltic contractions, until faeces are finally pushed towards the anal canal by mass movements. This article, the fifth in a six-part series exploring the gastrointestinal tract, describes the anatomy and functions of the large intestine. Citation: Nigam Y et al Gastrointestinal tract 5: the anatomy and functions of the large intestine.

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. All digestive organs play integral roles in the life-sustaining process of digestion. As is the case with all body systems, the digestive system does not work in isolation; it functions cooperatively with the other systems of the body. Consider for example, the interrelationship between the digestive and cardiovascular systems.

Digestive System Organs

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. The stomach is part of the digestive system and is connected to the: esophagus — a tube-like organ that connects the mouth and throat to the stomach. The area where the esophagus joins the stomach is called the gastroesophageal GE junction. The first part of the small intestine is called the duodenum, and it is this part that is connected to the stomach. The stomach is surrounded by a large number of lymph nodes.

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.

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 organs of the digestive system can be separated into two main groups: those forming the alimentary canal and the accessory digestive organs. The alimentary canal, also called the gastrointestinal tract, is a continuous, hollow muscular tube that winds through the ventral body cavity and is open at both ends. Its organs include the following:. Food enters the digestive tract through the mouth , or oral cavity, a mucous membrane-lined cavity. The esophagus or gullet , runs from the pharynx through the diaphragm to the stomach.


sphincter incompetence – gastrooesophageal reflux. (GER). Surgical treatment. STOMACH. Anatomy and histology. - Cardia. - Fundus. - Corpus. - Antrum. -.


Overview of the Digestive System

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 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

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.

Basic Anatomy and Physiology of the Gastrointestinal Tract

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Digestive System Anatomy and Physiology

Это ей снится. Трудно было даже пошевельнуться: события вчерашнего дня вычерпали все ее силы без остатка.

3 comments

  • Marshall C. 19.11.2020 at 04:26

    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.

    Reply
  • Katharina A. 19.11.2020 at 10:52

    PDF | The anatomy and physiology of the ferret is different than cats or dogs. Gastrointestinal disease has is usually manifested by diarrhea, weight | Find, read.

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  • Nochesfijat1961 21.11.2020 at 23:48

    Basic Anatomy and Physiology of the Gastrointestinal Tract. Authors; Authors Download chapter PDF Fig. Basic anatomy of the GI tract.

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