Development of veins nagwa
- 2. 3/19/2012 2 Faculty Of Medicine Anatomy Department
- 3. 3 Development of Veins & Lymphatics Dr. nagwa ebrahim
- 4. Note Note In embryonic life In embryonic life The main The main oxygenation organ oxygenation organ is the placenta is the placenta 4
- 5. ..Vitellinev Vitelline v ..Vitellinea Vitelline a ..Cardinal v Dorsal aorta Cardinal v Dorsal aorta Umbilical v ..Umbilical v .Umbilical a .Umbilical a 5
- 6. :The embryo has 3 sets of veins ☻Vitelline V. ☻Umbilical V. ☻Cardinal V. 6
- 7. Three paired veins drain into the heart at Three paired veins drain into the heart at week embryo--4 week embryo 4 Vitelline veins return poorly oxygenated blood from Yolk Sac (gut). Umbilical veins carry well- oxygenated blood from the chorion. Common cardinal veins return poorly oxygenated blood from the body of the embryo. 7
- 8. Sinus venosus Rt. Lt. horn horn .Vitelline vs .Umbilical VS 8
- 9. SV 9
- 10. ☻The Vitelline V. Yolk Sac 10
- 11. Yolk Sac incorporated in GIT Yolk Sac incorporated in GIT 11
- 12. Septum transversum & Septum transversum & Liver development Liver development 12
- 13. Vitelline veins Course oThey follow vitello-intestinal duct (that connect yolk sac with midgut) into the embryo. oAfter passing through the septum transversum they oEnter venous end of the heart (sinus venosus) 13
- 14. Septum transversum divide course of vitelline veins into 3 parts: ☺Supra-hepatic ☺Hepatic ☺Infra-hepatic 14
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- 16. FATE OF VITELLINE VEINS 16
- 17. Between septum Between septum transversum & Sinus transversum & Sinus venosus venosus Both V. V. form Rt. & Lt. Hepatic Veins Rt. + Lt. hepatic veins :Unite into .Common Hepatic v (Rt. Hepatocardiac channel) Will give Hepatic segment of the IVC 17
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- 19. Inside septum Inside septum transversum transversum V.V. break into 2 Hepatic sinusoids 19
- 20. Caudal to septum Caudal to septum transversum transversum V.V. anastomose 2 as 8-shaped figure Parts of the 8 figure Parts of the 8 figure Disappear giving: Disappear giving: Portal v. Portal v. Sup. Mesenteric v. Sup. Mesenteric v. Splenic v.. Splenic v 20
- 21. Portal vein Splenic vein Superior mesenteric .v
- 22. ☻Left vitelline V. regress ☻Right vitelline V. forms • Portal v. • Sup. Mesenteric v. • Splenic V. 22
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- 25. Umbilical Veins 25
- 26. -Rt. & Lt. umbilical veins pass on each side of the liver - become connected to hepatic sinusoids on their way. 26
- 27. As the liver enlarges the Umblical Veins Lose their connection with the heart (SV) & empties into the liver 27
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- 29. -Rt. umbilical vein degeneRates (7 th week) -lt. umbilical vein is the only to carry blood from placenta to liver -ductus venosus is a communication between left umbilical vein and Rt. Hepatocardiac channel 29
- 30. Fate of Left Umbilical Vein 30
- 31. Summary After birth: - Left umbilical vein is obliterated to form ligamentum teres -Ductus venosus is obliterated to form ligamentum venosum 31
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- 34. Int. Jugular V. .Subclavian V .Innominate V SVC 34
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- 37. Vetilline Umbilical Cardinal Venous systems 37
- 38. SV 38
- 39. Cardinal Venous system Ant. Cardinal V ..Post. Cardinal V Ant. Cardinal V Post. Cardinal V .. ((cephalicregion)) cephalic region ((caudal region)) caudal region 39
- 40. Fate of Common Cardinal Veins Rt. CCV Lt. CCV Lower part . Oblique V of SVC Of Lt. atrium 40
- 42. Anastomosis connect Ant. Cardinal veins 2 42
- 43. Rt. Ant. CARdinAl V o Rt. Int. Jugular V. c o Rt. Innominate V. o Upper Part SVC .lt. Ant. CARdinAl V o Lt. Int. Jugular V. o Lt. Sup. Intercostal V. AnAstomotiC ChAnnel caudal part of left ant. cardinal .Lt. Innominate V Vein degenerate
- 44. Formation of Superior vena Cava Formed from oRight common cardinal v. oProximal portion of Rt. Ant. cardinal v. 44
- 45. Congenital Anomalies Of SVC A) Left SVC B) Double SVC
- 46. Post. Cardinal veins Connected by iliac anastomosis 46
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- 49. ::Only remains are Only remains are .Rt. Post. Cardinal V Root Azygos Rt. Common iliac v. .Lt. Post. Cardinal V Lt. Common iliac v. 49
- 50. New veins develop: oSub-cardinal oSupra-cardinal v. & replace posterior cardinal veins. 50
- 51. o 2 Sub-cardinal veins anastomose o 2 Supra-cardinal veins anastomose o Both Sub & Supra- cardinal veins anastomose 51
- 52. Supracardinal veins Last veins to develop Drain body wall by intersegmental v. 52
- 53. Sub-cardinal veins Mainly develop to drain the developing kidney 53
- 54. Supra-renal v IVC Left Renal v .Gonadal v 54
- 55. On both sides On Rt. Side oSupra-renal oMost of IVC oGonadal Anastomosis bet. Both oLeft renal vein 55
- 56. Supra-renal v IVC Left Renal v .Gonadal v 56
- 57. Supracardinal veins Last veins to develop Drain body wall by intersegmental v. 57
- 58. cranial caudal :Cranial parts On Rt. Azygos On Lt. Hemiazygos :Caudal parts On Rt. IVC On Lt. disappear 58
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- 61. Inferior vena cava 1-Supra hepatic segment: by proximal part of Rt. VV Supra hepatic segment 2-Hepatic segment : by anastomosis anastomosis anastomosis between Rt. Hepatic segment VV and Rt. Subcardinal v. 3- Pre-renal segment : by Rt. Subcardinal v. Pre-renal segment 4- Renal segment: by Rt. Sub-supracardinal anastomosis anastomosis anastomosis Renal segment 5- Post-renal segment: by Rt. Supracardinal v. 6- Beginning of IVC: by iliac anastomosis of posterior cardinal veins anastomosis anastomosis Post-renal segment Beginning of IVC 61
- 62. Congenital Anomalies Of IVC 62
- 63. Double Inferior Vena Cava Due to persistence of lower part of left supracardinal vein 63
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- 65. Absence of hepatic segment of inferior vena cava -Due to failure of SVC anstomosis between Rt. azygos Vitelline vein and Rt. Subcardinal vein -blood from lower half of the body is drained by azygos vein into SVC 65
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- 67. vessel s Sacs Nodes Prof. Dr. Kawther Ahmed
- 68. Development of lymphatics 6 lymph sacs: 2 jugular 2 long. Lymph vesseles 2 sciatic from which thoracic duct 1 retroperitoneal develops 1 cisterna chyli Lymph nodes develop along lymph vesseles (lymphocytes) 68
- 69. Which of the following shares in the formation of the oblique vein of left atrium? A. Right common cardinal vein B. Left common cardinal vein C. Left umbilical vein D. Right umbilical vein
- 70. The upper part of the superior vena cava develops from? A. Right common cardinal vein B. Left common cardinal vein C. Right anterior cardinal vein D. Left anterior cardinal vein
- 71. Thank you