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sinus venosum, subcardinal vein, supra cardinal vein, s. mesenteric v., i.…
sinus venosum
left horn
umbilical v.
X
vitelline v.
X
cardinal v.
coronary sinus
right horn
cardinal v. -->superior vena cava
posterior
degrade
anterior
左支degrade
右支保留
右頭臂靜脈幹
umbilical v.
vitelline v.(inferior vena cava)
subcardinal vein
adrenal v.
gonadal v.
renal segment of IVC
renal v.
supra cardinal vein
hemiazygos vein
azygos vein
s. mesenteric v.
hepatic portal vein
hepatic sinusoid
hepatic vein
i. mesenteric v.
splenic v.
sacral cardinal vein
支配下肢的血管（左邊degrade）