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Types of circulatory system - class-XI
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Hepatic portal system is found in
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A
All mammals
💡 Explanation:
A) The hepatic portal system is the venous system that returns blood from the digestive tract and spleen to the liver. It is present in mammals.
B) Not all amniotes have a hepatic portal system.
C) The hepatic portal system is found in amphibians and mammals.
D) Higher invertebrates do not have a hepatic portal system.
E) Mammals have a hepatic portal system.
So the correct answer is 'All mammals'.