Assertion: umbilical cord's vein | /r/CapableOf | drain bed
Facets:
Source sentences:
text: Some of the superior hypophyseal arteries form primary capillary beds in the hypothalamus and the veins draining those beds ramify again to form secondary capillary beds in the adenohypophysis (anterior lobe of the pituitary), thus forming a portal circulation (the hypothalamic-pituitary portal circulation).