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carry blood away from heart (oxygenated blood in systemic circulation) (deoxygenated blood in pulmonary circulation)
carry blood to the heart (deoxygenated blood in systemic circulation) (oxygenated blood in pulmonary circulation)
circle of willis
anastomosis between vertebral and internal carotid arteries; unites the anterior and posterior blood supplies of brain
hepatic portal system
connects capillary beds in GI tract with those in liver without first passing through heart; allows for immediate processing of the substances in blood obtained from GI tract through digestion
contains several vascular structures unique to the fetus; allows blood to bypass fetal lung, which in non-functional in utero so that umbilical vessels circulate blood to and from placenta via umbilical cord
artery (arteriole) -> capillary -> venule (vein) -> capillary -> venule -> vein
pathway for circulation at portal system
gastric vein, splenic vein, inferior mesenteric vein, superior mesenteric vein
four veins that drain into the hepatic portal vein
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