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Topic: Hepatic portal vein

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	Portal vein - Wikipedia, the free encyclopedia
		The portal vein is the largest vein in the human body draining blood from the digestive system and its associated glands.
		Increased blood pressure in the portal vein, portal hypertension, occurs in liver disease (mainly cirrhosis), and may lead to various complications (ascites, esophageal varices, spontaneous bacterial peritonitis).
		A disruption of the hypothalamo-pituitary portal veins is referred to as Pickardt syndrome (suprasellar failure).
	en.wikipedia.org /wiki/Portal_vein (321 words)

	Liver - Encyclopedia.WorldSearch (Site not responding. Last check: 2007-10-16)
		The central area where the common bile duct, portal vein, and hepatic artery enter the liver is the hilum or "porta hepatis".
		The umbilical vein enters the abdomen at the umbilicus, and passes upward along the free margin of the falciform ligament of the liver to the inferior surface of the liver.
		The ductus venosus carries blood from the left portal vein to the left hepatic vein and thence to the inferior vena cava, allowing placental blood to bypass the liver.
	encyclopedia.worldsearch.com /liver.htm (1557 words)

	Anatomy of the liver
		Venous blood from the entire gastrointestinal tract (containing nutrients from the intestines) is brought to the liver by the hepatic portal vein.
		Branches of this vein pass in between the lobules and terminate in the sinusoids.
		Hepatic vein - one of several short veins originating within the lobes of the liver as small branches, which unite to form the hepatic veins.
	www.ariess.com /s-crina/liver-anatomy.htm (505 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		A central vein, the smallest branch of the hepatic vein, is located in the center of each classic hepatic lobule.
		Cords of hepatocytes extend from the central vein to the periphery of the lobule.
		Because blood flow in the classic hepatic lobule occurs from the periphery towards the central vein, the hepatocytes on the periphery are most active.
	www.muhealth.org /~md2006/block2/12.05.02-histology.doc (719 words)

	Bullfrog Dissection - Circulatory System (Site not responding. Last check: 2007-10-16)
		The hepatic portal itself is formed by the union of the gastric vein (which goes to the underside of the stomach) and the mesenteric vein (which connects smaller vessels to the mesentery).
		The renal portal is one of the branches of the large femoral vein, the principal vein of the hind leg.
		The renal portal vein unites with a sciatic vein from the leg and passes to the kidney.
	www.biologycorner.com /bio3/bullfrog-circulatory.html (828 words)

	Liver (An Overview) (Site not responding. Last check: 2007-10-16)
		The porta of the liver is where the hepatic artery, portal vein lymphatics, and nerves enter the liver and where the hepatic ducts exit.
		In the middle of each lobule is a central vein and at the periphery of each lobule are branches of the hepatic portal vein and hepatic artery, opening into spaces between hepatic plates.
		Arterial blood and portal venous blood, containing nutrient molecules absorbed in the gastrointestinal tract mix as the blood flows from the periphery of the lobule to the central vein.
	www.innerbody.com /text/card69.html (463 words)

	JPMA ::: (Site not responding. Last check: 2007-10-16)
		Portal hypertension results in the development of collaterals to bypass the increased resistance to flow within the portal bed and to return blood to the systemic circulation.
		The patient was diagnosed as a case of extra hepatic portal vein obstruction leading to portal hypertension and was operated for the same.
		Portal hypertension is characterized by a pathologic increase in portal venous pressure that leads to the formation of an extensive network of porto systemic collaterals that divert a large fraction of portal blood to the systemic circulation, bypassing the liver.
	jpma.org.pk /JPMA/01Jan05/fulltext13.htm (1212 words)

	Spinal substance P transmits bradykinin but not osmotic stimuli from hepatic portal vein to hypothalamus in rat. (Site not responding. Last check: 2007-10-16)
		The portal vein of anesthetised rats was superfused with 0.2 ml of 4% NaCl or 1 microM bradykinin, and hypothalamo-neurohypophysial responses were measured either electrophysiologically or by radioimmunoassay of arginine vasopressin.
		The spinal injection of 8 microliter 0.1 mM capsaicin at T8-T9 elicited a pronounced hypothalamo-neurohypophysial response, and diminished reversibly the response to bradykinin superfusion of the portal vein.
		The spinal transmitter for osmosensitive afferents, and the physiological importance of the portal vein area in chemosensation remain to be established.
	www.pdg.cnb.uam.es /UniPub/iHOP/gp/4613997.html (345 words)

	hepatic portal system
		The liver is unusual in that it has a double blood supply; the right and left hepatic arteries carry oxygenated blood to the liver, and the portal vein carries venous blood from the GI tract to the liver.
		The hepatic portal system begins in the capillaries of the digestive organs and ends in the portal vein.
		Portal blood is passed through the hepatic lobules where nutrients and toxins are absorbed, excreted or converted.
	www.geronova.com /hepaticportalsystem.htm (154 words)

	liver
		This vein, which is the source of 75 percent of the liver's blood supply, carries blood to the liver that has traveled from the digestive tract, where it collects nutrients as food is digested.
		Hepatitis may be caused by exposure to certain chemicals, by autoimmune diseases, or by bacterial infections.
		When this occurs, toxins are not adequately removed from the blood, blood pressure increases in the hepatic portal vein, and substances produced by the liver, such as blood proteins, are not adequately regulated.
	www.geocities.com /Heartland/Estates/9350/liver.html (2076 words)

	SIU SOM Histology GI
		Blood from both portal vein and hepatic artery mixes together in the hepatic sinusoids and then passes out of the liver through the hepatic vein.
		Both the hepatic portal vein and the hepatic artery branch in parallel along the corners of hepatic lobules, in regions called portal areas.
		In cross sections, the lobule is filled by cords of hepatic parenchymal cells, hepatocytes, which radiate from the central vein and are separated by vascular sinusoids.
	www.siumed.edu /~dking2/erg/liver.htm (2087 words)

	Different subtypes of alpha 1A-adrenoceptor mediating contraction of rat epididymal vas deferens, rat hepatic portal ... (Site not responding. Last check: 2007-10-16)
		The alpha 1-adrenoceptor subtype mediating contraction of the rat hepatic portal vein to phenylephrine was characterized by use of competitive antagonists previously shown to have selectivity between the expressed alpha 1-subtype clones.
		The pA2 values on the rat portal vein correlated highly with their previously published pA2 values for the alpha 1A-adrenoceptors mediating contraction of the rat epididymal vas deferens and human prostate and poorly with those for the alpha 1B- and alpha 1D-adrenoceptors mediating contraction of the rat spleen and aorta, respectively.
		The antagonist pA2 values on the rat portal vein correlated highly with their previously published pK1 values for the expressed alpha 1a-clone and poorly with those for the expressed alpha 1b- and alpha 1d-clones.
	www.pdg.cnb.uam.es /UniPub/iHOP/gp/845738.html (321 words)

	Case 0998_06 -- "IPS": Congenital Portal to Hepatic Vein Shunt (Site not responding. Last check: 2007-10-16)
		Contrast-enhanced abdominal CT scan; the right portal vein is enlarged and shows a curvilinear connection (arrow) to a dilated right hepatic vein.
		The left portal vein showed reversed flow and filled from a midline collateral which presumably represented a paraumbilical collateral.
		We believe this to be a congenital portal to hepatic venous shunt, a rare condition in humans, although apparently more common in veterinary circles, having been reported in several types of animals.
	www.scvir.org /members/caseclub/0998/0998_06/0998_06.htm (439 words)

	Abdominal Veins and Arteries (Site not responding. Last check: 2007-10-16)
		Veins usually carry blood straight to the atria of the heart, but those of the abdominal tissues are exceptions.
		Its largest tributary is the "inferior mesenteric vein," which brings blood up from the descending colon, sigmoid colon, and the rectum.
		After passing through the portal veins of the liver, blood is carried through a series of merging vessels into the "hepatic veins." These empty into the "inferior vena cava," and return the blood into circulation.
	www.innerbody.com /text/card25.html (121 words)

	THE MERCK MANUAL, Sec. 4, Ch. 46, Vascular Lesions
		The main variants are replacement of the left or right hepatic artery, an accessory left or right hepatic artery, or a common hepatic artery originating from the superior mesenteric artery.
		Hepatic artery occlusion is uncommon but can be caused by thrombosis, embolism, abdominal trauma, or surgical ligation.
		Hepatic artery thrombosis can also complicate traumatic injury, liver transplantation, or angiographic perfusion of the liver with anticancer drugs.
	www.merck.com /mrkshared/mmanual/section4/chapter46/46b.jsp (262 words)

	hepbpg2
		Portal area: situated at he corner of each lobule, it is a complex composed of branches of the hepatic portal vein, hepatic artery, bile duct, and nerve.
		Sinusoids: delicate blood channels between the radiating rows of hepatocytes which transport blood from the branches of the hepatic portal vein and hepatic artery from the portal areas to the central vein.
		Central vein: a blood vessel in the middle of each lobule which receives blood from the hepatic portal vein and hepatic artery via the sinusoids and drains the blood into the hepatic vein.
	www.asiahomes.com /hepbinfo/link1.htm (1063 words)

	[No title] (Site not responding. Last check: 2007-10-16)
		The portal vein, gastroduodenal artery, and the common bile duct all pass immediately deep to the first part of the duodenum.
		The correct answer is: Splenic vein to left renal vein The splenic vein is a major vein of the portal system, while the left renal vein is a major vein of the caval system.
		The correct answer is: Left hepatic duct Like the left hepatic vein, the left hepatic duct drains bile from the left lobe, quadrate lobe, and part of the caudate lobe of the liver.
	www-personal.umich.edu /~benwei/cgi-data/shared/linked/DPLG(PQ).doc (2675 words)

	[No title]
		The structural plan of the liver is a reflection of its vascular supply, and it is important to understand the transitional relationships between the incoming hepatic artery and portal vein, and the hepatic vein which drains blood from the liver into the inferior vena cava.
		The blood sinusoids receive blood from the distributing branches of the hepatic portal vein and to a lesser extent, from branches of the hepatic artery at the outer margins of the lobule.
		Sublobular veins unite to form larger veins which can be seen in solitary as tributaries of the main hepatic vein.
	www.georgetown.edu /dml/educ/hist/lab10/lab10.txt (1454 words)

	hepatic portal vein
		Blood that is rich in nutrients from the digestive tract is carried to the liver by the hepatic portal vein.
		Cancer.gov Tumor that extends into branches of the portal or hepatic veins allowed; No tumor invading the main portal vein (portal trunk) or inferior vena cava;...
		hepatic portal vein :...hepatic portal vein : A short blood vessel that carries blood to the liver from the stomach and intestine.
	www.cancer-help.org /cancer/0604/hepatic_portal_vein.html (364 words)

	BIOL 231 Lecture Outline
		The blood in the hepatic portal vein is rich in nutrients and other substances absorbed by the digestive tract.
		Portal systems are venous systems in which blood moves from capillaries to veins to capillaries and then back to veins.
		Most of the blood from the umbilical vein passes through the DUCTUS VENOSUS, a vascular shunt that allows most of the blood to bypass the fetal liver circulation, since the nutrients in the blood have already been processed by the mother's liver (see the hepatic portal system in the previous section).
	people.morehead-st.edu /fs/m.mcmurr/231-L16.html (1269 words)

	Laboratory Nineteen: Liver, Gallbladder, and Pancreas
		The portal vein is the largest vessel to have a thin wall.
		Observe the organization of the portal triads, hepatocytes, sinusoids, central veins and hepatic veins in relationship to the classic lobule and hepatic acinus.
		The hepatic vein can be distinguished from the central vein by its thick wall of dense connective tissue which the central vein lacks.
	medinfo.ufl.edu /year1/histo/review/lab19.html (1425 words)

	Circulation (Site not responding. Last check: 2007-10-16)
		The four pulmonary veins return the oxygenated blood (oxygen-rich) to the left atrium of the heart.
		The main sources are the hepatic artery, which as a branch of the aorta, supplies oxygenated blood to the liver and the hepatic portal vein, which is formed by the union of veins from the spleen, the stomach, pancreas, duodenum and the colon.
		The hepatic artery and hepatic portal vein open into the liver sinuses where the blood is in direct contact with the liver cells.
	www.botany.uwc.ac.za /SCI_ED/grade10/manphys/circulation.htm (488 words)

	Portal glucose infusion increases hepatic glycogen deposition in conscious unrestrained rats -- Cardin et al. 87 (4): ...
		Effects of hepatic portal infusion of pyruvate on pancreatic hormone response during exercise.
		A new method to measure portal and hepatic blood flow using taurocholate in the rat.
		Niijima, A. Glucose-sensitive afferent nerve fibers in the hepatic branch of the vagus nerve in the guinea-pig.
	jap.physiology.org /cgi/content/full/87/4/1470 (3671 words)

	Hepatic myospherulosis complicating portal vein embolisation -- Lui et al. 57 (2): 155 -- Journal of Clinical Pathology
		Hepatic myospherulosis complicating portal vein embolisation -- Lui et al.
		microscopically, in the context of portal vein thrombosis with
		Portal vein embolization vs. portal vein ligation for induction of hypertrophy of the future liver remnant.
	jcp.bmjjournals.com /cgi/content/full/57/2/155 (1457 words)

	uhrad.com - Body Imaging Teaching Files (Site not responding. Last check: 2007-10-16)
		Iatrogenic hepatic portal venous gas as the result of diagnostic or therapeutic procedures is usually benign.
		However, in a patient with hepatic portal venous gas without history of previous diagnostic or therapeutic intervention, there is usually invasion of anaerobic bacteria into the intestinal tract.
		In patients who have non-iatrogenic hepatic portal venous gas, CT scan is a very sensitive modality for identifying the hepatic portal venous gas.
	www.uhrad.com /ctarc/ct085.htm (290 words)

	Yo Biz : hepatic portal circulation (Site not responding. Last check: 2007-10-16)
		The hepatic portal system begins in the capillaries of the digestive organs and ends in the an attempt to bypass the obstructed liver circulation.
		Hepatic encephalopathy is a syndrome observed in of portal blood into the systemic circulation through portosystemic collateral vessels.
		of the body: arterial circulation of the brain, hepatic portal circulation, and fetal circulation the Brain and the Circle of Willis.
	www.yo-biz.com /portal/hepatic-portal-circulation.htm (335 words)

	Anastomosis of the ovarian vein to the hepatic portal vein in sheep induces ovarian hyperstimulation associated with ...
		Anastomosis of the ovarian vein to the hepatic portal vein in sheep induces ovarian hyperstimulation associated with increased LH pulsatility, but only in the absence of the contralateral ovary
		Oestradiol and progesterone concentrations were substantially higher in ovarian venous blood than in hepatic venous blood, both in AN and SO ewes, whereas inhibin A levels were not significantly modified by passage through the liver in either group.
		In conclusion, AN of the ovary to the liver via the mesenteric vein provides a useful model for studying the feedback between the ovary and the hypothalamo-pituitary system and the mechanisms controlling follicle development.
	joe.endocrinology-journals.org /cgi/content/abstract/165/2/411 (472 words)

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