the alimentary tract

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the digestive system the alimentary tract the alimentary tract a long muscular tube with many sections and areas. begins with the mouth and ends with the anus. 2 the alimentary tract mouth pharynx esophagus stomach small intestine large intestine anus 3 accessory parts organs that are not in the alimentary tract but helps in the digestion teeth tongue salivary glands liver gall bladder pancreas 4 mouth functions: food enters in the mouth or oral cavity tasting mechanical breakdown of food secretion of salivary glands (salivary amylase) 5 mouth structures in the mouth that aids digestion: teeth – cut, tear, crush and grind food. salivary glands – produce and secrete saliva into the oral cavity. parotid (beneath the cheeks) submaxillary (below the jaw bone) sublingual (below the tongue) – saliva moistens the food and contains enzymes (ptyalin or salivary amylase) that begins digestion of starch into smaller polysaccharides. 6 mouth tongue …

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s the surface area of the stomach. churns and grinds together the bolus into smaller pieces. food is mixed with gastric juices (hydrochloric acid and enzymes) secreted by the stomach walls. hcl helps break down food and kills bacteria that came along with the food. 14 stomach 15 stomach pepsin – major enzyme; converts proteins into peptides in the presence of hcl. mucus – lubricates food and protects the gastric lining from strong digestive juices. converts the bolus into a liquid (chyme) after 4 hrs of mechanical and chemical digestion chyme passes through the pyloric sphincter into the small intestine. 16 movements in stomach 17 small intestine long (20 ft), coiled tube beneath the stomach. has three parts: duodenum – upper part; about 10 in; connected to the stomach. – where the digestive juices from the pancreas and the liver combine with chyme making it thin and watery. jejunum – …

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on larger diameter, but shorter (5 ft) water is absorbed from the undigested food making the waste harder until it becomes solid. waste stays for 10 – 12 hours. 23 large intestine 24 large intestine waste is pushed into the expanded portion (rectum) of the large intestine. solid waste stays in the rectum until it is excreted through the anus as feces. appendix hangs on the right side of the large intestine. 25 accessory organs produce or store enzymes that helps in digestion. liver largest gland of the body stores vitamins a,d,e,k stores sugar and glycogen produces bile (watery, greenish substance) secretes bile to the gall bladder via the hepatic duct and cystic duct. 26 accessory organs gall bladder stores bile in between meals secretes bile to the duodenum through the bile duct during mealtime. bile contains bile salts, pigments, cholesterol and phospholipids. bile is an emulsifier not an enzyme. …

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"the alimentary tract" haqida

the digestive system the alimentary tract the alimentary tract a long muscular tube with many sections and areas. begins with the mouth and ends with the anus. 2 the alimentary tract mouth pharynx esophagus stomach small intestine large intestine anus 3 accessory parts organs that are not in the alimentary tract but helps in the digestion teeth tongue salivary glands liver gall bladder pancreas 4 mouth functions: food enters in the mouth or oral cavity tasting mechanical breakdown of food secretion of salivary glands (salivary amylase) 5 mouth structures in the mouth that aids digestion: teeth – cut, tear, crush and grind food. salivary glands – produce and secrete saliva into the oral cavity. parotid (beneath the cheeks) submaxillary (below …

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