About half of oxygenated umbilical venous blood goes through liver
The other half bypass liver
* Goes into IVC via ductus venosus
* Joins the venous blood from lower limbs
* Then hepatic vein blood join IVC
The streams of blood stay mostly separate in IVC
Blood with mostly umbilical venous blood
--> Passes through the right atrium
(then shunted through foramen ovale)
--> Enters left atrium, then left ventricle
Rest of the IVC blood joins the SVC blood
--> Passes through the right atrium
--> Enters the right ventricle
Because of the large pulmonary resistance
LV output goes into ascending aorta
[BL8:p266]
Umbilical vein
Superior vena cava
Inferior vena cava (IVC)
Right ventricle
Ductus arteriosus
Ascending aorta
Descending aorta
Umbilical arteries
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Reviewed | 20050816 |