Pituitary Gland

Pituitary Gland

1. Adenohypophysis

   • Pars distalis
     • Constitutes the bulk of anterior lobe Highly vascular
   • Pars intermedia
     • b/w pars distalis and neural lobe Avascular and almost noon existent
   • Pars tuberalis
     • Elongated collecting secretory cells Superficially surrounding neural stalk Most vascular

2. Neurohypophysis

   • Median eminence
     • Below 3rd ventricle Small highly vascular protrusion of base of hypothalamus Portal vessels arise here
   • Infundibular stem
     • Funnel shaped structure arising from median eminence The floor of 3rd ventricle is known as infundibulum
   • Infundibular processes
     • Forms bulk of posterior lobe