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

15. 15

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

18. 18

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

23. 23

24. 24
Umbilical veins

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

28. 28

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

32. 32

33. 33
Cardinal
veins

34. Int. Jugular V.
.Subclavian V
.Innominate V
SVC
34

36. 36

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

47. 47

48. ………………Disappear
Replaced By
☻Sub-cardinal &
☻Supra-cardinal veins
48

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

59. 59

60. 60

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

64. 64

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

66. 66

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