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Digestive System PowerPoint Presentation
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Digestive System

Digestive System

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Digestive System

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Presentation Transcript

  1. Digestive System

  2. Trace the path of food… • Descending colon • Esophagus • Pyloric sphincter • Ascending colon • Transverse colon • Sigmoid colon • Anus • Ileum • Pharynx • Cardiac sphincter • Duodenum • Stomach • Rectum • Cecum • Soft palate • Hard palate • Jejunum

  3. Trace the path of food… • Hard palate • Soft palate • Pharynx • Esophagus • Cardiac sphincter • Stomach • Pyloric sphincter • Duodenum • Jejunum • Ileum • Cecum • Ascending colon • Transverse colon • Descending colon • Sigmoid colon • Rectum • Anus

  4. Do you know… • Function of salivary glands? • What happens in stomach? • What happens in small intestine? • What happens in large intestine? • Function of liver? • Function of gall bladder? • Function of pancreas?

  5. Layers of the Alimentary Canal • Mucosa - epithelia • Submucosa – connective tissue • Muscularisexterna – layers • Serosa – peritoneum • Visceral • Parietal • Connected by mesentery

  6. The Oral Cavity • Palate • hard • Soft • Uvula • Teeth • Incisors • Canines • Molars • Salivary glands

  7. Esophagus • Peristalsis • Cardiac sphincter • “Loose” closure • Relies on diaphragm to help close • GERD • Hiatal hernia • Squid “fun fact”!

  8. Day 2 • Digestive system concept map • Notes • Pig day 3

  9. Stomach • Three layers of muscle • Lining • SCE • Gastric pits • Mucous neck cells • Gastric glands • Parietal cells – HCl • Chief cells – pepsin • Enteroendocrine cells - gastrin

  10. Small Intestine • Lining • Villi • Capillary bed • Lymph vessel • Crypts of Lieberkuhn • Enzymes from pancreas, liver • Chemical digestion, water absorption

  11. Accessory Organs

  12. Accessory Organs • Liver • Makes bile • Nutrient conversion, other metabolic function • Detox • Gall bladder • Stores bile • Emulsifies fats • Pancreas • Pancreatic juices

  13. Chemical Digestion • Carbohydrates • Begins? • In stomach? • Amylase, brush border enzymes in SI • Fats • Emulsified by? • Lipase in SI • Proteins • Pepsin in stomach • Proteases, brush border enzymes in SI

  14. Pig Dissection

  15. Disorders and Diseases of the Digestive System • gingivitis and periodontal disease • plaque forms tarter • cardiovascular disease • gastroesophageal reflux disease • heartburn • ulcers • Helicobacter pylori

  16. Disorders and Diseases of the Digestive System • gastroenteritis • inflammation of stomach or intestine • inflammatory bowel disease • chronic inflammation • ulcerative colitis • Crohn’s disease • constipation and diarrhea • infrequent or too frequent defecation

  17. Disorders and Diseases of the Digestive System • hepatitis • inflammation of liver • pancreatitis • inflammation of pancreas • gallstones • bile forms crystals • cholecystectomy • cancer • digestive system cancers are common Roblan/Shutterstock.com