portal circulation refers to the circulation of the blood from the small intestine to the liver, via the portal vein. Blood flow to the liver is unique in that it receives oxygenated and de-oxygenated blood. Blood passes from branches of the portal vein through cavities between "plates" of hepetocytes called sinusoids. Blood also flows from branches of the hepatic artery and mixes into the sinusoids to supply the hepatocytes with oxygen. This mixture percolates through the sinusoids and collects in a central vein which drain into the hepatic vein. The hepatic vein subsequently drains into the inferior vena cava. =)
Human circulatory system can be divided into two, pulmonary circulation system and systemic circulation system. First, oxygenated blood is transported from the lung to the heart by pulmonary vein. Then it is transported to all part of the body by aorta-vein-venules-capillaries. It becomes deoxygenated blood after oxidation of food at the cell body. The blood is transported back to the heart from the capillaries of the cell body by arterioles-artery-vena cava. Next, is is transported back to the lung for gaseous exchange by pulmonary artery. The whole circulation is repeated again and again until the end of your life...=)muahh
A portal circuit is found the cardiovascular system. Usually, very small arteries called arterioles lead into a capillary bed and tiny veins called venules come off. In a portal system veins come into a capillary bed and come off. This system is very slow moving since the pressure from the artery side is lacking. There are only two of these in the human body: one in the liver and hypophyseal area.
three types
no
a curtain
1) Hepatic Portal Vein 2) Renal Portal System 3) Hypothalamic-Hypophyseal Portal System not so sure about number 2 :P
it allows humoral factors in hypophyseal portal circulation or systemic circulation to access hypothalamic nuclei via retrograde axonal transport (i.e. feedback regulation of pituitary hormones)
Portal circulation involves the liver, and the portal vein (unlike most organs, where an artery carries blood TO the organ) carries blood TO the liver from the intestines. The liver helps to process nutrients, and enzymatically convert medication and drugs into both active and inactive by-products. The largest vessel in this system is the portal vein, followed by the hepatic veins, which carry blood from the liver to the inferior vena cava and back to the heart. The function of the hepatic portal circulation is to : collect absorbed nurtients for metabolic processing or storage.
no
The portal circulation is a "strange" circulation because it consists of veins draining into capillaries, which drain into veins again.
a curtain
No. Portal Hypertension is specific hypertension in the portal system while general hypertension is the primary hypertension. Portal hypertension happens when there is high pressure in the portal circulation or the circulation in the Liver and lower body organs.
Portal.... (:
it is 5. the pulmonary,systemic,renal,portal, coronary circulation
Hepatic portal circulation is a human anatomy system of veins comprising tributaries. It is also known to be called portal venous system. It is for directing blood from parts of the gastrointestinal tract to the liver.
two types: "normal" via the hepatic artery and "portal" via the portal vein outflow is directly to the inferior vena-cava. "PORTAL" describes the flow of blood that has already bathed the intestines from the mesinteric artery
hepatic portal circulation
1) Hepatic Portal Vein 2) Renal Portal System 3) Hypothalamic-Hypophyseal Portal System not so sure about number 2 :P
It is called the hepatic portal circulation. A portal system is a system of blood vessels that begin in capillaries and end in capillaries without passing through the heart. The hepatic portal system begins in the capillaries in the digestive tract wall and ends in the capillaries in the liver.
Yes