PPT-The Digestive System Gastrointestinal tract Physiology

Dr Suaad M Ghazi MBChB MSc PhD Objective of lecture 3 Explain gastric anatomy and how gastric secretion and stomach motility are regulated lower oesophageal sphincter Body corpus. A. Bacterial Diseases of the Upper Digestive Tract (Mouth & Stomach). 1. Tooth Decay (dental caries). A) This is an endogenous infection . 1) Most common infectious disease of humans . 2) Young are more susceptible than old. By Mr. Style. Parts of the Digestive System. The Mouth:. The . mouth is the beginning of the digestive system, and, in fact, digestion starts here before you even take the first bite of a meal. The smell of food triggers the salivary glands in your mouth to secrete saliva, causing your mouth to water. When you actually taste . The . digestive system . is involved in the ingestion and digestion of food and elimination of indigestible material.. Digestion takes place within the . digestive tract. , which begins with the mouth and ends with the anus.. Segments of the GI tract. and . Sphincters. (. t. onically. contracted ). . GI Track Functions. Ingestion. . Digestion. Absorption. Defecation. There are two stages of . digestion. Mechanical digestion. Chapter 13 & 14. Dr. Gary Mumaugh. University of Northwestern - St. Paul. Digestive System: Overview. Figure 23.1. Clinical Manifestations of Gastrointestinal Dysfunction. Anorexia. A lack of a desire to eat despite physiologic stimuli that would normally produce hunger. General Biology II. BSC 2011. Insert photo here representing. chapter. (credit: . modification of work by Julie Rybarczyk). Types of Digestive Systems. Heterotrophs are divided into three groups based on their food sources. PowerPoint® Lecture Slides prepared by Jason LaPres. Lone Star College - North Harris. Introduction to the Digestive System. Acquires nutrients from environment. Anabolism. Uses raw materials to synthesize essential compounds. . Qattan. 2. The GI tract. . (gastrointestinal tract). . Mouth. Pharynx. Esophagus. Stomach. Small intestine. Large intestine. Anus. The accessory digestive organs. Supply secretions contributing to the breakdown of food. pharynx to esophagus all food changes that occur in the alimentary canalAnatomy Physiology Digestive System Ziser 2003breaking large molecules proteins fats starches etca thick coating of bicarbona From the GastroenterologywwwacggiorgWhat is a Gastroenterologist1489V 3/17/04 441 PM Page 1the gastrointestinal tract and liver pancreas gallbladder bile ducts and liver It involves a detailedof nu 1. Gastrointestinal (GI) Tract. A) . Tubular . structure from mouth to anus. 2. Accessory Structures. A) . Teeth. , tongue, salivary glands, liver, gallbladder & pancreas. Digestive System. B. 6 basic processes. System. Dr.Fadia. Al-. khayat. The digestive system is composed of a continuous tract beginning with the oral cavity and ending at the anus. this tract is called the . alimentary canal . or the . gastrointestinal tract (GIT). continual supply . of water, electrolytes, and . nutrients.To. achieve . this requires . (. 1) movement of food through. the alimentary tract; (2) secretion of digestive juices. and digestion of the food; (3) absorption of water,. 4 . December 2012. Introduction to the alimentary system. T. he burden of GI diseases. Professor Julian . Walters. Gastroenterology. Overview. The organs of the alimentary tract. Symptoms and signs .