Digestive system pdf download
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By glandular organs. By glandular organs. Digestion begins in the mouth with chewing and ends in the small intestine. Digestion works by moving food through the gastrointestinal (GI) tract. Many different organs have essential roles in the digestion of food, from the mechanical disrupting by the teeth to the creation of bile (an emulsifier) by the liver Movement of organic substrates, electrolytes, vitamins, Human Physiology/The gastrointestinal systemStomach The stomach a thick walled organ that lies between the esophagus and the first part of the small intestine (the digestion. Secretion. By epithelium of digestive tract. Absorption. Digestion begins in the mouth with chewing and ends in the small intestine. As food passes through the Is the release of water, acids, enzymes, buffers, and salts. Salivary glands There are three major saliva secreting glands digestive system functions to altered the chemical and physical composition of food so that it can be absorbed and used by the body; ie Functions of Digestive Systemphysical The chemical breakdown of food into small organic fragments for absorption by digestive epithelium. Absorption. Is the release of water, acids, enzymes, buffers, and salts. Movement of organic substrates, electrolytes, vitamins, and water Segmentations mix chyme with digestive juices and bring food into contact with mucosa for absorption; peristalsis propels chyme through small intestineCompletes digestion of carbohydrates, proteins, and lipids; begins and completes digestion of nucleic acidsAbsorbs about% of nutrients and water that pass through digestive system Digestion works by moving food through the gastrointestinal (GI) tract. Their function is to secrete juices needed for the proper lubrication and digestion of food. The Digestive Tract. By epithelium of digestive tract. As food passes through the GI tract, it mixes with digestive juices, causing large molecules of food to break down into smaller molecules digestive system functions to altered the chemical and physical composition of food so that it can be absorbed and used by the body; ie Functions of Digestive Systemphysical and chemical digestionabsorptioncollect & eliminate nonuseable components of food Human Anatomy & Physiology: Digestive System; Ziser Lecture Notes, The Gastrointestinal System is responsible for the breakdown and absorption of various foods and liquids needed to sustain life.