venous drainage of the abdomen Flashcards
2 systems that drain the abdominal structures
- Portal venous system
- Systemic venous system
Systemic system
Transports deoxygenated blood to the right atrium of the heart.
The major vessel of the systemic system:
- IVC
It is the common vein for venous drainage of all structures below the diaphragm
IVC
IVC formed by the
Common iliac veins
At L5
the abdominal aorta ends at ________, but veins drain into the _________
the level of L4
IVC at L5
The IVC ascends _______ and leaves the abdomen by _____________
superiorly
piercing the central tendon of the diaphragm at the level of T8
Within the thorax, the IVC drains into the
RA of the heart
The hepatic portal system carries venous blood.
Although it is deoxygenated, it is
rich in nutrients that has been extracted from food, to the liver for processing.
The major vessel of the portal system
= Portal vein
the portal system a point of conversion for the venous drainage of the
spleen, pancreas, gall bladder and the abdominal part of the GIT
the portal vein is formed by the union of the
splenic vein and the superior mesenteric vein, posterior to the neck of the pancreas at L2
As it ascends towards the liver, the portal vein passes
posteriorly to the superior part of the duodenum.
immediately before entering the liver, the portal vein divides into
R and L branches, which then enter the liver separately
Portosystemic/caval anastomoses
