The renal portal system is derived from the posterior cardinal veins found in fishes, amphibians, and reptiles.
It is absent in hagfish, lampreys, and mammals.
Blood from the posterior part of the body flows into the renal portal veins, which pass into the caudal vena cava.
Thus, the correct answer is option D.
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Similar Questions
Q1
Renal portal system is made of
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Q2
The table shows the functions of portal system in a frog. Choose the best option given below.
I.Portal System
II.Function
A) Renal portal system
Collects blood from all parts of the body
B) Renal portal system
Carries blood from hind limbs to kidneys
C) Hepatic portal system
Carries blood from liver to alimentary canal
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Q3
Which of the following statements are correct? 1. Frogs lack nictitating membrane. 2. Frogs have 3 chambered heart. 3. Frogs possess 2 portal systems: renal portal system & hepatic portal system.
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Q4
The table shows the functions of portal system in a frog. Choose the best option given below.
I.Portal System
II.Function
A) Renal portal system
Collects blood from all parts of the body
B) Renal portal system
Carries blood from hind limbs to kidneys
C) Hepatic portal system
Carries blood from liver to alimentary canal
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Q5
The renal portal system of vertebrates is significant for