Changes

The pars nervosa stores and releases '''oxytocin''' and '''antidiuretic hormone (ADH)'''.

The pars nervosa stores and releases '''oxytocin''' and '''antidiuretic hormone (ADH)'''.

===Anterior pituitary(Adenohypophysis)===

===Anterior pituitary(Adenohypophysis)===

Consisting of the '''Pars Tuberalis and Pars Distalis''' this part has an embryological origin as an epithelial upgrowth from the foetal oral cavity called '''Rathke's Pouch'''. The anterior lobe of the adenohypophysis produces '''growth hormone (GH)''', '''follicle stimulating hormone (FSH)''', '''luteinising hormone (LH)''', '''adrenocorticotrophic hormone (ACTH)''', '''thyroid stimulating hormone (TSH)''' and '''prolactin (PRL)'''. For further information on each of these hormones, click [[Pituitary Gland - Anatomy & Physiology#Hormones of the Anterior Pituitary Gland|here]].

Consisting of the '''Pars Tuberalis and Pars Distalis''' this part has an embryological origin as an epithelial upgrowth from the foetal oral cavity called '''Rathke's Pouch'''.  

====Pars Tuberalis====

====Pars Tuberalis====

The pars tuberalis is a thin band of endocrine cells around the infundibular stalk. It is dense in '''melatonin''' receptors, and functions to regulate release of reproductive hormones according to season.   

The pars tuberalis is a thin band of endocrine cells around the infundibular stalk. It is dense in '''melatonin''' receptors, and functions to regulate release of reproductive hormones according to season.   

====Pars Distalis====

====Pars Distalis====

The pars distalis contains five cell types (somatotropes, lactotropes, corticotropes, thyrotropes and gonadotropes).  The endocrine cells within the pars distalis synthesize, store and release six hormones in response releasing and inhibiting factors from the [[Hypothalamus - Anatomy & Physiology|hypothalamus]].  These factors reach the pars distalis in the '''hypophyseal portal system''', which connects capillaries of the median eminence to the capillaries of the pars distalis.

The pars distalis contains five cell types (somatotropes, lactotropes, corticotropes, thyrotropes and gonadotropes).  The endocrine cells within the pars distalis synthesize, store and release six hormones in response releasing and inhibiting factors from the [[Hypothalamus - Anatomy & Physiology|hypothalamus]].  These factors reach the pars distalis in the '''hypophyseal portal system''', which connects capillaries of the median eminence to the capillaries of the pars distalis. The hormones produced are '''growth hormone (GH)''', '''follicle stimulating hormone (FSH)''', '''luteinising hormone (LH)''', '''adrenocorticotrophic hormone (ACTH)''', '''thyroid stimulating hormone (TSH)''' and '''prolactin (PRL)'''. For further information on each of these hormones, click [[Pituitary Gland - Anatomy & Physiology#Hormones of the Anterior Pituitary Gland|here]].

===Pars Intermedia===

===Pars Intermedia===