The portal circulations in the body... please help?!?!?

A list of the names of portal circulations in the human body ???

and please include the following:

definition

anatomical location and

significance of each portal circulation

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  • Anonymous
    7 years ago
    Best Answer

    The hypophyseal portal system is the system of blood vessels that link the hypothalamus and the anterior pituitary in the brain.

    It allows endocrine communication between the two structures : the hypothalamus secretes releasing and inhibitory hormones in the portal system such as corticotropin-releasing hormone or thyrotropin-releasing hormone, and they are received by the anterior pituitary. Using these, the anterior pituitary is able to fulfill its function of regulating the other endocrine glands.

    It is one of the portal systems of circulation of the human body; that is, it involves two capillary beds connected in series by venules. One other such system is the hepatic portal system. This portal venous system is responsible for directing blood from parts of the gastrointestinal tract to the liver. Substances absorbed in the small intestine travel first to the liver for processing before continuing to the heart. Not all of the gastrointestinal tract is part of this system. The system extends from about the lower portion of the esophagus to the upper part of the anal canal. It also includes venous drainage from the spleen and pancreas.

    Source(s): wiki
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