The neurohypophyse , posterior pituitary gland or hypothalamo-hypophyseal apparatus corresponds to the posterior part of the Hypophyse. Constituted of fabric Nervous, it is acted in fact of a diverticulum of the Hypothalamus which is placed, during the development Embryon naire, dorsalement against a diverticulum pharyngien which, gives rise to the epithelial Hypophyse to him. In the neurohypophyse important fascicule of nerve fibreses finish coming from the brain, in particular those which come from the Noyau supraoptic and the Noyau paraventriculaire. The neurohypophyse plays also a part Endocrinien by secreting various hormones of which the antidiuretic Hormone (Vasopressine) and the Oxytocine. This last cheek a big role in the Metabolic regulation of the functions S, sexual and maternal. The hypohyse is a structure which is found in all the species of Vertébré S.

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