Biology, 12.07.2019 06:20 keagank

What is portal system?
a. it is where an organ has a lot of capillaries for better circulation.
b. it is where an organ is supplied with two interconnecting arteries.
c. it is where an artery supplies blood to an organ and immediately returns to the heart.
d. it is where an artery breaks into two sets of capillaries before returning to the heart.
e. it is where two or more branches of an artery supply blood to different organs.

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What is portal system?
a. it is where an organ has a lot of capillaries for better circulatio...