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Digestive System Azami PHD Digestive System Anatomy • Digestive tract – Alimentary tract or canal – GI tract • Accessory organs – Primarily glands • Regions – – – – – – – Mouth or oral cavity Pharynx Esophagus Stomach Small intestine Large intestine Anus Oral Cavity • Mouth or oral cavity – Vestibule: Space between lips or cheeks and alveolar processes – Oral cavity proper • Lips (labia) and cheeks swallowing Pharynx and Esophagus Peritoneum • Peritoneum – Visceral: Covers organs – Parietal: Covers interior surface of body wall – Retroperitoneal: Behind peritoneum as kidneys, pancreas, duodenum Mesenteries • Mesenteries – Routes which vessels and nerves pass from body wall to organs Stomach Anatomy • Openings – Gastroesophageal: To esophagus – Pyloric: To duodenum • Regions – – – – Cardiac Fundus Body Pyloric Small Intestine • Site of greatest amount of digestion and absorption • Divisions – Duodenum – Jejunum – Ileum Jejunum & ileum Pancreas • Anatomy – Endocrine • Pancreatic islets produce insulin and glucagon – Exocrine • Acini produce digestive enzymes – Regions: Head, body, tail Pancreas Large Intestine
