Hypophyseal portal system
System of blood vessels / From Wikipedia, the free encyclopedia
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The hypophyseal portal system is a system of blood vessels in the microcirculation at the base of the brain, connecting the hypothalamus with the anterior pituitary. Its main function is to quickly transport and exchange hormones between the hypothalamus arcuate nucleus and anterior pituitary gland. The capillaries in the portal system are fenestrated (have many small channels with high vascular permeability) which allows a rapid exchange between the hypothalamus and the pituitary. The main hormones transported by the system include gonadotropin-releasing hormone, corticotropin-releasing hormone, growth hormone–releasing hormone, and thyrotropin-releasing hormone.
Hypophyseal portal system | |
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Identifiers | |
Latin | venae portales hypophysiales |
MeSH | D007030 |
Anatomical terminology |