Anatomy Microscopic anatomy Hormones and target tissues
Anteriorlobe(adenohypophysis)
pars distalis
a. carotis int. 
aa. hypophysiales
sup.  primary
capillary plexus in
eminentia
mediana receives
neurosecretions
from
hypothalamus 
vv. portales
hypophysiales
distribute
neurosecretions
to  secondary
capillary plexus in
anterior lobe 
efferent
hypophyseal
veins  vv.
jugulares
internae
trabecular epithelium in cords and clusters,
reticular fibers
chromophobes
undifferentiated cells
degranulated chromophilic cells
stromal cells
lack hormonal activity
chromophils
acidophilic
nonglandotropic
mammotropic
cells
smallpolypeptides
dopamin (PIH)

(PRF  prolactin
mammary gland in
gravidity and
lactations
somatotropic
cells
somatostatin (GHIH)

GHRH  somatotropin
(STH)
directly liver and
growth plates
other tissues via
somatomedins
basophilic
glandotropic
corticotropic
cells
glycoproteins
CRH  ACTH, MSH
adrenal cortex
 cortisol
melanocytespars tuberalis
thyrotropic cells TRH  TSH
thyroid
 thyroxin, T3
pars intermedia
Rathke’s cysts
gonadotropic
cells
GnRH  FSH (ICSH), LH
gonads
 androgens,
estrogens,
progesterone
Posteriorlobe
(neurohypophysis)
eminentia
mediana 
infundibulum
a. carotis int. 
aa. hypophysiales
inf. 
fenestrated
capillaries 
efferent
hypophyseal
veins
nonmyelinated axons
of hypothalamic neurons n. supraopticus,
n. paraventricularis (tractus
hypothalamohypophysialis),
pituicytes
smallpeptides
ADH
tubulus reuniens,
ductus colligens
t.media of vessels
oxytocin
myometrium of
uterus during
gravidity
myoepithelium of
lactating
mammary gland
pars nervosa