Blood vessel's wall and neurosecretion at the neurohypophysis.
D000818:Animals; D001808:Blood Vessels / Q000648:ultrastructure*; D002415:Cats; D009490:Neurosecretory Systems / Q000648:ultrastructure*; D010904:Pituitary Gland, Posterior / Q000098:blood supply* / Q000502:physiology / Q000648:ultrastructure