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Anatomy of the Small Intestine PowerPoint Presentation

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Description : Check out this medical presentation on Digestive System, which is titled "Anatomy of the Small Intestine", to know about the different parts of small intestine, the anatomy of duodenum, jejunum & ileum regarding: the shape, length, site of beginning & termination, peritoneal covering, arterial supply & lymphatic drainage, difference between each part of duodenum regarding the length, level & relations, and the difference between the jejunum & ileum regarding the characteristic anatomical features of each of them.

Tags : Digestive System, Anatomy, Small Intestine

Published on : Jul 10, 2021 | Views : 2963 | Downloads : 6

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Slide 1-

ANATOMY OF THE SMALL INTESTINE Dr. Jamila El-Medany
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OBJECTIVES At the end of the lecture, students should: List the different parts of small intestine. Describe the anatomy of duodenum, jejunum & ileum regarding: the shape, length, site of beginning & termination, peritoneal covering, arterial supply & lymphatic drainage. Differentiate between each part of duodenum regarding the length, level & relations. Differentiate between the jejunum & ileum regarding the characteristic anatomical features of each of them.
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Posterior abdominal wall Anterior abdominal wall What is MESENTERY? Loop of intestine
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1 2 FIXED (Retro peritoneal) PART (NO MESENTERY) DUODENUM FREE (MOVABLE) PART (WITH MESENTERY) JEJUNUM & ILEUM
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DUODENUM SHAPE: C-shaped loop LENGTH: 10 inches BEGINNING: at pyloro-duodenal junction TERMINATION: at duodeno-jejunal flexure PERITONEAL COVERING: retroperitoneal
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PARTS The duodenum is divided into (4) parts: 1st : Superior. 2nd : Descending (vertical). 3rd : Inferior (Horizontal) 4th : Ascending
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LENGTH – SURFACE ANATOMY
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Structures Related psoas pancreas
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RELATIONS OF FIRST PART X Anterior Liver 1) 2) 3) X Posterior 1)Bile duct 2) Gastroduodenal artery 3)Portal vein
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RELATIONS OF SECOND PART X Anterior 1)Liver 2)Transverse Colon 3)Small intestine Posterior Right kidney Lateral R Colic Flexure Medial Pancreas
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OPENINGS IN SECOND PART OF DUODENUM Common opening of bile duct & main pancreatic duct: on summit of major duodenal papilla. Opening of accessory pancreatic duct (one inch higher): on summit of minor duodenal papilla.
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RELATIONS OF THIRD PART Anterior: a)Small intestine b) Superior mesenteric vessels Posterior: 1) Right psoas major 2) Inferior vena cava 3) Abdominal aorta 4) Inferior mesenteric vessels. 1 2 3
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RELATIONS OF FOURTH PART Anterior: Small intestine Posterior: Left psoas major psoas
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Blood Supply & Lymph drainage Because the duodenum is derived from both: Foregut & Midgut, It has its Arterial Supply from : Celiac & Superior mesenteric arteries. Venous Drainage to : Superior mesenteric& Portal veins. LYMPHATIC DRAINAGE: Celiac & Superior mesenteric lymph nodes.
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JEJUNUM & ILEUM SHAPE: Coiled tube LENGTH: 6 meters (20 feet) BEGINNING: at Duodeno-jejunal flexure TERMINATION: at Ilieo-caecal junction EMBRYOLOGICAL ORIGIN: Midgut Blood SUPPLY: Superior mesenteric A & V LYMPHATIC DRAINAGE: Superior mesenteric lymph nodes
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THANK YOU