Dr. ANAND SRINIVASAN 5 Dec 2011. Students at the end of the class should be able to : Understand...
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Transcript of Dr. ANAND SRINIVASAN 5 Dec 2011. Students at the end of the class should be able to : Understand...
![Page 1: Dr. ANAND SRINIVASAN 5 Dec 2011. Students at the end of the class should be able to : Understand and explain the rotation of midgut and its clinical.](https://reader038.fdocuments.in/reader038/viewer/2022110206/56649cd95503460f949a1f1d/html5/thumbnails/1.jpg)
EMBRYOLOGY OF DIGESTIVE SYSTEM - 2
Dr. ANAND SRINIVASAN
5 Dec 2011
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OBJECTIVES
Students at the end of the class should be able to :
Understand and explain the rotation of midgut and its clinical correlates
Formation, derivatives of hindgut and its clinical correlates
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MIDGUT
Communicates with yolk sac – Vitelline duct
Supplied by – Superior mesesteric A.
Formation of ‘primary intestinal loop’
Physiological umbilical herniation
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Rotation of Midgut
Counterclockwise rotation – 90° + 180 °
Retraction of herniated loops
Cecal bud – last to enter abdominal cavity
Distal end of cecal bud – Appendix
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Omphalocele
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Gastrochisis
SURVIVAL RATES
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Meckel’s diverticulumm
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Abnormal rotation of gut
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Reversed Rotation
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Volvulus
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Gut atresia and stenosis
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HINDGUT
Distal 1/3 of transverse colon – upper part of anal canal
Hind gut – Cloacal membrane
Allantois – Primitive urogenital sinus
Formation of ‘Urorectal septum’
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Ectoderm part – proctodeum
Cloacal membrane (Anal membrane)
Pectinate line
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Hindgut abnormalities
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Congenital megacolon
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RECOMMENDED READING
LANGMAN’S MEDICAL EMBRYOLOGY – 11th edition
CHAPTER 14 – Digestive system Pgs. 223 – 233