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Assertion : Heart of fish contains only deoxygenated blood.
Reason : Oxygenated blood does not return back to the heart in fishes
  • 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 : Heart of fish contains only deoxygenated blood.Reason : Ox...
Assertion-Reason Question Explanation:

Assertion: Heart of fish contains only deoxygenated blood.

Reason: Oxygenated blood does not return back to the heart in fishes.

Explanation:
- Assertion Explanation: In fishes, the heart only pumps deoxygenated blood to the gills for oxygenation. The heart receives the deoxygenated blood from the body and pumps it to the gills, where it picks up oxygen and returns to the body. Therefore, the heart of fish contains only deoxygenated blood.
- Reason Explanation: In fish, after the blood is oxygenated in the gills, it is distributed to the body tissues directly without returning to the heart. This is known as single circulation. As a result, the heart of fish only receives deoxygenated blood from the body and pumps it to the gills for oxygenation.
Therefore, both the Assertion and Reason are true, and the Reason correctly explains why the heart of fish contains only deoxygenated blood. Hence, the correct answer is option 'a'.
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Community Answer
Assertion : Heart of fish contains only deoxygenated blood.Reason : Ox...
The heart is a pumping organ for blood circulation which consists of chambers communicating with each other. In fishes the heart is two-chambered, consisting of an auricle and a ventricle. An accessory chamber called sinus venosus is also present which serves as a reservoir and opens anteriorly into auricle through the sino - atrial aperture. Fish heart contains and pumps only deoxygenated blood because after getting oxygenated from gills, the blood doesn't return back to the heart. Instead, it is supplied directly to the various parts of the body.
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Assertion : Heart of fish contains only deoxygenated blood.Reason : Oxygenated blood does not return back to the heart in fishesa)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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