NEETZoologyStructural Organisation in Animals
Given below are two statements: one is labelled as Assertion (A) and the other is labelled as Reason (R). Assertion (A): In frogs, venous blood from the hindlimbs does not drain directly into the main systemic veins leading to the heart. Reason (R): Frogs possess a renal portal system that first routes blood from the lower body parts to the kidneys. In the light of the above statements, choose the most appropriate an
Options
- ABoth (A) and (R) are correct but (R) is not the correct explanation of (A)
- B(A) is correct but (R) is not correct
- CBoth (A) and (R) are correct and (R) is the correct explanation of (A)
- D(A) is not correct but (R) is correct
Correct answer
C. Both (A) and (R) are correct and (R) is the correct explanation of (A)
Step-by-step solution
In frogs, special venous connections are present between the lower parts of the body and the kidneys, known as the renal portal system. Due to this system, venous blood from the hindlimbs and lower body parts is first routed to the kidneys before it eventually reaches the heart. Therefore, the blood does not drain directly into the main systemic veins leading to the heart. Thus, both Assertion and Reason are correct, and the Reason correctly explains the Assertion. Answer: Both (A) and (R) are correct and (R) is th