The liver consumes about 20% of total body oxygen when at rest, so the total liver blood flow is quite high. This worksheet is in pdf format and holds a printable version of the quiz the hepatic portal circulation. Hepatic encephalopathy is a severe complication of both chronic and acute liver diseases. Blood from the hepatic artery is oxygenated but nutrientpoor compared to that supplied by the hepatic portal vein. The hepatic portal vein is formed by the union of the, which drains the,, and the, which drains the and. The liver is the largest organ in the body, normally weighing about 1. The presence of curcumin conjugates in the portal circulation is consistent with reports that curcumin undergoes glucuronidation and sulphation in the intestine of both humans and rodents ireson. The hepatic portal system is the venous system that returns blood from the. Taurel p, blanc p, dauzat m, chabre m, pradel j, gallix b, et al. In 1902, gilbert and carnot introduced the term portal hypertension to describe this condition. In human anatomy, the hepatic portal system is the system of veins comprising the hepatic. The liver collects the absorbed nutrients for metabolic processing or for storage before releasing them back to the bloodstream for general cellular use. Detection of curcumin and its metabolites in hepatic. The hepatic circulation the hepatic circulation is the most complex in the body by virtue of its dual blood supply, with 75% of afferent blood flow provided by the portal vein and the remaining 25% provided by the hepatic artery.
Hepatic portal system anatomy and related liver functions. This is an online quiz called hepatic portal circulation. Hepatic venous angiography in the evaluation of cirrhosis of the liver. Click on the tags below to find other worksheets in the same. The hepatic artery, portal venous system and portal. The porta hepatis serves as the point of entry for the hepatic portal vein and the proper hepatic artery, and. Veins from the spleen, stomach, pancreas, gallbladder, and intestines do not drain directly in the ivc inferior vena cava as other abdominal organs do blood is actually delivered to the liver through the hepatic portal vein.
Part 1 aorta superior vena cava inferior vena cava hepatic portal vein notes. The hepatic portal system is a series of veins that carry blood from the capillaries of the stomach, intestine, spleen, and pancreas to capillaries in the liver. Within the liver parenchyma, portal veins and hepatic arteries arborize together along the efferent bile ductules. In human anatomy, the hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. A number of important functions depend on its normal operation, including digestion and absorption within the gut, maintenance of the mucosal barrier, and successful healing of surgical anastomoses, but we have little quantitative information about its physiology because routine measurement in humans is so difficult.
It emerges from capillaries of the spleen and organs of the digestive system and ends in hepatic sinusoids special vascular structures in the liver that function like capillaries. The unique dual blood supply of the liver 75% portal venous, 25% hepatic arterial makes multiphase helical computed tomography ct a highly suitable technique for hepatic evaluation with imaging in two arterial and portal venous or more phases. Hepatic arterial blood flow is affected by circulating vasoactive com. Click on the tags below to find other quizzes on the same subject. A read is counted each time someone views a publication summary such as the title, abstract, and list of authors, clicks on a figure, or views or downloads the fulltext. The presence of curcumin conjugates in the portal circulation is consistent with reports that curcumin undergoes glucuronidation and sulphation in the intestine of. Anatomy of the liver, portal vein, hepatic portal system logged in as bingbot click here to login as a. In the second system, the hepatic portal circulation, capillaries originating in the gastrointestinal tract and the spleen merge to form the portal vein, which enters the liver and divides to form portal capillaries. It is the fraction of drug lost during the process of absorption which is generally. The hepatic portal vein receives blood specifically from the stomach, intestines, pancreas, and spleen, and carries it into the liver through the porta hepatis. Spontaneous hepatic artery thrombosis with infarction of. This allows hormones from the islets of langerhans of the pancreas, such.
Lecture 3 hepatic portal circulation flashcards quizlet. The main vessel of the hepatic portal system is the hepatic portal vein figures 3. Study 17 terms hepatic portal circulation flashcards quizlet. Many drugs that are absorbed through the gi tract are substantially metabolized by the liver before reaching general circulation. Portal hypertension occurs when there is an obstruction of blood flow through the liver, and pressure rises within the portal vein. Part 5 of 6 in a lecture on peripheral circulation in a flipped human anatomy course taught by wendy riggs.
Hepatic portal circulation printable worksheet purposegames. Start studying lecture 3 hepatic portal circulation. The portal circulation the liver is unusual in that it has a double blood supply. A comprehensive approach to hepatic vascular disease1 the liver has a complex vascular supply, which involves the inflow of oxygenated blood through the hepatic artery systemic circulation and deoxygenated blood through the portal vein portal circulation, as well as the outflow of deoxygenated blood through. When alcohol enters the circulation, it is distributed in various tissues, and a portion. The vein, which drains the lesser curvature of the. The hepatic portal system collects nutrientrich venous blood draining from the digestive viscera and delivers it to the liver. This allows hormones from the islets of langerhans of the pancreas, such as insulin and glucagon, as read more. Multiphase helical ct has become an important tool in the detection and characteriza. Circulation of blood pulmonary circulation carries blood to and from the lungs arteries deliver deoxygenated blood to the lungs for gas exchange path goes from right ventricle through pulmonary arteries, lungs, pulmonary veins, to left atrium hepatic portal circulation unique blood route through the liver. It is the fraction of drug lost during the process of absorption which is generally related to the liver and gut wall.
The hepatic portal circulation is the flow of blood from the beginning of the hepatic portal system to the end of it. Nov 15, 2015 part 5 of 6 in a lecture on peripheral circulation in a flipped human anatomy course taught by wendy riggs. Portal circulation definition of portal circulation by. Hepatic portal system blood glucose dka and insulin shock. Hepatic portal system definition of hepatic portal. Right gastroepiploic vein inferior mesenteric vein superior mesenteric vein large intestine the hepatic portal circulation. Why is this blood carried to the liver before it enters the systemic circulation. Doppler study of mesenteric, hepatic, and portal circulation in alcoholic cirrhosis. The liver receives venous blood from the digestive tract, which is oxygen poor but nutrient rich. The axial size of the sample volume was adjusted to encompass the. Doppler study of mesenteric, hepatic, and portal circulation. The first pass effect also known as firstpass metabolism or presystemic metabolism is a phenomenon of drug metabolism whereby the concentration of a drug, specifically when administered orally, is greatly reduced before it reaches the systemic circulation. Splanchnic circulation bja education oxford academic.
The term hepatic encephalopathy stems from the belief that hepatic insufficiency is its fundamental etiopathogenic factor. Ductus venosus joins umbilical vein and inferior vena cava. Portal system is a system of blood vessels that begins and ends in capillaries. There is a mixing of portal and systemic blood circulation within the sinusoids, and all the blood eventually drains from the liver via the hepatic veins to the inferior vena cava. Google scholar smith gw, westgaard t, bjornhansen r. Ct of nonneoplastic hepatic vascular and perfusion disorders. This printable worksheet of hepatic portal circulation is tagged. Diagnosis and management of hepatic encephalopathy this is a pdf version of the following document. The hepatic circulation is unique among vascular beds. Portal venous system an overview sciencedirect topics. What is the source of blood in the hepatic portal system. Detection of curcumin and its metabolites in hepatic tissue. What is the hepatic portal system and how does it work. The hepatic portal vein supplies about 75% of the blood the liver requires, with the other 25% supplied by the hepatic artery.
Get an answer for what is the hepatic portal system and how does it work. Symptoms include varices, rectal bleeding, vomiting blood, ascites, hepatic encephalopathy, and enlarged spleen. By printig out this quiz and taking it with pen and paper creates for a good variation to only playing it online. The liver is the main organ of metabolism and energy production. The most obvious unique features include the dual vascular supply. Timeaveraged mean blood velocity tamv cms of the main portal vein was measured in its midportion, where the hepatic artery ha crosses the portal vein, on oblique subcostal scans. It is also called the portal venous system although it is not the only example of a portal venous system and splanchnic veins, which is not synonymous with hepatic portal system and is imprecise as it means visceral veins and not necessarily the veins of the abdominal.
Hepatic encephalopathy he represents a broad continuum of neuropsychological dysfunction in patients with acute or chronic liver disease andor portosystemic shunting of blood flow. Inferior vena cava inferior phrenic veins hepatic veins hepatic portal vein superior mesenteric. Study 17 terms hepatic portal circulation flashcards. The hepatic portal system see online here the usual course of the blood starts from the heart into the arteries, through. Portal hypertension is responsible for most of the complications that mark the transition from compensated to decompensated cirrhosis, namely variceal hemorrhage, ascites. Anatomy and physiology of hepatic portal system tutorial. The porta hepatis serves as the point of entry for the hepatic portal vein and the proper hepatic artery, and is the point of exit for the bile passages. The hepatic portal system is the system of veins comprising the hepatic portal vein and its tributaries. The hepatic portal vein carries venous blood partly derived from primary.
Hepatic circulation article about hepatic circulation by. Hepatic portal system an overview sciencedirect topics. The purpose of hepatic portal circulation is to deliver blood from some parts of the gastrointestinal tract to the liver. After percolating through the liver the hepatic portal system, the blood drains into the hepatic veins and then into the inferior vena cava. Hepatic portal carries nutrients from digestion to the liver to store and metabolize, after a meal. Jul 16, 2016 the function of the hepatic portal circulation is to route the venous blood in this respect, deoxygenated blood from the gi gastrointestinal tract through the liver, before mixing it with venous blood from the rest of the body through the inf. In principle this is identical to the hepatic portal system, which transports substances from the primary bed of capillaries in the. The hepatic portal vein is formed by the confluence of three main vessels, the gastric, pancreaticomesenteric, and lienomesenteric veins. Diagnosis and management of hepatic encephalopathy core. There is a printable worksheet available for download here so you can take the quiz with pen and paper. The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver where raw nutrients in blood are processed before the blood returns to the heart. Essentially, it drains the structures supplied ultimately by the celiac except for the gonads, anterior mesenteric. Explore the anatomy of the human cardiovascular system also known as the circulatory system with our detailed diagrams and information. Learn vocabulary, terms, and more with flashcards, games, and other study tools.
This worksheet is in pdf format and holds a printable version of the quiz hepatic portal circulation. A comprehensive approach to hepatic vascular disease. Portal hypertension is increased blood pressure in the blood vessels that lead to the liver. Circulation of blood pulmonary circulation carries blood to and from the lungs arteries deliver deoxygenated blood to the lungs for gas exchange path goes from right ventricle through pulmonary arteries, lungs, pulmonary veins, to left atrium hepatic portal circulation unique blood route through the. Pdf hepatic circulation and toxicology researchgate.
The function of the hepatic portal circulation is to route the venous blood in this respect, deoxygenated blood from the gi gastrointestinal tract through the liver, before mixing it with venous blood from the rest of the body through the inf. The portal venous system drains the intestines, pancreas, and spleen with numerous collateral anastomoses to other venous beds of the abdomen. However, most clinical cases show liver failure along with mesenteric venous portal hypertension. Liver hepatic portal circulation advanced exploring nature educational resource 20052020. Introduction as early as the 17th century, it was realized that structural changes in the portal circulation could cause gastrointestinal bleeding. Another name for the hepatic portal system is the portal venous system. The portal vein drains blood delivered to the above organs. Mar 19, 2020 the hepatic portal vein receives blood specifically from the stomach, intestines, pancreas, and spleen, and carries it into the liver through the porta hepatis.
753 489 1201 1006 1514 1512 741 52 1110 434 961 1244 987 959 67 312 80 776 599 1168 234 1089 946 1444 406 136 297 253 923 839 1058 1165 1396 576 1394 1046 733 876 453 245 67 125 535