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Assertion : Closed circulatory system is more effective than open type.
Reason : The closed circulatory system considerably enhances the speed, precision and efficiency of circulation.
  • a)
    If both Assertion and Reason are true and Reason is the correct explanation of Assertion.
  • b)
    If both Assertion and Reason are true but Reason is not the correct explanation of Assertion
  • c)
    If Assertion is true but Reason is false.
  • d)
    If both Assertion and Reason are false.
Correct answer is option 'A'. Can you explain this answer?
Most Upvoted Answer
Assertion : Closed circulatory system is more effective than open type...
There are some reasons behind the effectiveness of closed circulatory system over the open type. These are -
(i) The blood flows more rapidly in closed blood cavities
(ii) It takes much shorter time to circulate through the closed system and return to the heart.
(iii) This quickens the supply and removal of materials to and from the tissues by the blood.
(iv) In the closed system, the arteriolar diameter can be regulated to alter the blood flow, so the volume of blood flowing through a tissue or organ may be regulated according to its needs. No such regulation is possible in open type.
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Assertion : Closed circulatory system is more effective than open type.Reason : The closed circulatory system considerably enhances the speed, precision and efficiency of circulation.a)If both Assertion and Reason are true and Reason is the correct explanation of Assertion.b)If both Assertion and Reason are true but Reason is not the correct explanation of Assertionc)If Assertion is true but Reason is false.d)If both Assertion and Reason are false.Correct answer is option 'A'. Can you explain this answer?
Question Description
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