A) Hypothalamic neurons in the paraventricular nuclei
B) Neurons in the ventral hypothalamus
C) Hypothalamic neurons in the supraoptic nuclei
D) Superior hypophyseal artery
E) Infundibulum (connecting stalk)
F) Hypothalamic hypophyseal tract
G) Inferior hypophyseal artery
H) Hypophyseal portal system
I) Primary capillary plexus
J) Hypophyseal portal veins
K) Secondary capillary plexus