(D) portal system is defined as a system of blood vessels in which a vein starts as capillaries in one organ and ends as capillaries in another organ,

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$A$ vein that starts as capillaries in one organ and ends as capillaries in another organ before returning to the heart.

(D) portal system is defined as a system of blood vessels in which a vein starts as capillaries in one organ and ends as capillaries in another organ,rather than leading directly to the heart. For example,the hepatic portal system carries blood from the digestive tract to the liver before it reaches the heart.

Class 11 Chemistry Data Entry - Chemistry Level 0 of all question bank

What is a portal system?

A
$A$ vein that starts from an organ and ends in the heart.
B
An artery that divides in an organ and reforms by the union of its capillaries.
C
Blood entering the heart after passing from the digestive tract to the kidneys.
D
$A$ vein that starts as capillaries in one organ and ends as capillaries in another organ before returning to the heart.