portal circulation

por·tal cir·cu·la·tion

1. circulation of blood to the liver from the small intestine, the right half of the colon, and the spleen through the portal vein; sometimes specified as the hepatic portal circulation; 2. more generally, any part of the systemic circulation in which blood draining from the capillary bed of one structure flows through a larger vessel(s) to supply the capillary bed of another structure before returning to the heart; for example, the hypothalamohypophysial portal system.

por·tal cir·cu·la·tion

(pōr'tăl sĭr'kyū-lā'shŭn) 1. Circulation of blood to the liver from the small intestine, the right half of the colon, and the spleen through the portal vein; sometimes specified as the hepatic portal circulation. 2. More generally, any part of the systemic circulation in which blood draining from the capillary bed of one structure flows through a larger vessel(s) to supply the capillary bed of another structure before returning to the heart, e.g., the hypothalamohypophysial portal system.

HEPATIC PORTAL CIRCULATION

portal circulation

1. Blood flow from the abdominal organs that passes through the portal vein, the sinusoids of the liver, and into the hepatic vein before returning to the heart from the inferior vena cava. This pathway permits the liver to process and to detoxify substances entering the body from the gastrointestinal tract. 2. A portal system between the hypothalamus and the anterior pituitary gland. The hypothalamus secretes releasing or inhibiting hormones into the blood; they are carried directly to the anterior pituitary and stimulate or inhibit secretion of specific hormones. See: Hepatic Portal Circulation illustrationSee also: circulation

单词	portal circulation
释义	portal circulation Translations portal circulation portal circulation [′pȯrd·əl ‚sər·kyə′lā·shən] (physiology) The passage of venous blood through a portal system. portal circulation por·tal cir·cu·la·tion 1. circulation of blood to the liver from the small intestine, the right half of the colon, and the spleen through the portal vein; sometimes specified as the hepatic portal circulation; 2. more generally, any part of the systemic circulation in which blood draining from the capillary bed of one structure flows through a larger vessel(s) to supply the capillary bed of another structure before returning to the heart; for example, the hypothalamohypophysial portal system. por·tal cir·cu·la·tion (pōr'tăl sĭr'kyū-lā'shŭn) 1. Circulation of blood to the liver from the small intestine, the right half of the colon, and the spleen through the portal vein; sometimes specified as the hepatic portal circulation. 2. More generally, any part of the systemic circulation in which blood draining from the capillary bed of one structure flows through a larger vessel(s) to supply the capillary bed of another structure before returning to the heart, e.g., the hypothalamohypophysial portal system. HEPATIC PORTAL CIRCULATION portal circulation 1. Blood flow from the abdominal organs that passes through the portal vein, the sinusoids of the liver, and into the hepatic vein before returning to the heart from the inferior vena cava. This pathway permits the liver to process and to detoxify substances entering the body from the gastrointestinal tract. 2. A portal system between the hypothalamus and the anterior pituitary gland. The hypothalamus secretes releasing or inhibiting hormones into the blood; they are carried directly to the anterior pituitary and stimulate or inhibit secretion of specific hormones. See: Hepatic Portal Circulation illustrationSee also: circulation FinancialSeePORTALThesaurusSeecirculation
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