The blood circulation, which starts in capillaries and ends in capillaries, is called:
A
portal circulation
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B
renal circulation
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C
lymphatic circulation
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D
hepatic circulation
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Solution
The correct option is A portal circulation
Portal system can be defined as a part of the systemic circulation, in which blood draining from the capillary bed of one structure flows through larger vessels to supply the capillary bed of another structure, before returning to the heart.
Example: The hepatic portal circulation travels from the intestine of the digestive tract to the liver.