what is portal system and explain the types also.
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Portal systems are characterized as special veins that arise in one organ system and terminate in another before returning to the heart.
Types of portal system
It is of following types :
Hepatic portal system : Found in all chordates. In mammals, there is a single vein called hepatic portal vein, formed by the union of six main veins, which drain venous blood from different parts of alimentary canal (digestive system) into the liver.
rachanarathore:
but their are many types of portal system
yes
how many types
Lower vertebrates have two so-called portal systems, areas of the venous system that begin in capillaries in tissues and join to form veins, which divide to produce another capillary network en route to the heart. They are called the hepatic (liver) and renal (kidneys) portal systems.
Examples of such systems include the hepatic portal system, the hypophyseal portal system, and (in non-mammals) the renal portal system. Unqualified, portal venous system often refers to the hepatic portal system.
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Answer:
a portal system is a conneection between two organs through a portal vein
Explanation:
2 types of portal systems
1.hepatic portal system:connection between liver and intestine through a portal vein
2.renal portal system:connection between kidneys aand intestine through renal portal vein
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