Histological Structure Of Pituitary Gland

Histological Structure Of Pituitary Gland

“What is the histological structure of the pituitary gland? A detailed question and answers guide”

Histology of Hypophysis Cerebri
Answer:

• It is also called Pituitary gland
• It has been divided into
  • Anterior part pars anterior
  • Intermediate part pars intermedia
  • Posterior partpars posterior
• Pars posterior & infundibular stalk together forms neurohypophysis
• Pars anterior & pars intermedia forms adenohypophysis

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Histology of hypophysis cerebriv Adenohypophysis:

Histology of hypophysis cerebri Pars anterior:

• It consists of cords of cells separated by Sinusoids
• It consists of following cells
  1. Chromophil
     • Contains brightly stained granules
     • It is further classified into

Histology of hypophysis cerebri Acidophil or Alpha Cells:

Alpha Cells Types:

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Histology of hypophysis cerebri Basophil or beta cells:

Beta Cells Types:

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2. Chromophobe cells

• Contains very few granules

Pars tuberalis:

• Histology of hypophysis cerebri Pars tuberalis Consists of:
  1. Undifferentiated cells
  2. Acidophil
  3. Basophil

Pars intermedia:

• It is poorly developed
• Contains colloid filled vesicles
• Some cells produce melanocyte stimulating hormone

Pars intermedia Cells:

• Beta cells
• Secretory cells
• Chromophobe cells

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Pars intermedia Neurohypophysis:

Pars intermedia Pars posterior:

• It consists of numerous Unmyelinated nerve fibres
• These are axons of neurons
• There are supporting cells called Pituicytes between these axons
• These cells have long dendritic processes
• The pars posterior is associated with the release of

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1. 1. Vasopressin
   2. Oxytocin