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What distinguishes the circulatory pathways in birds and mammals from those in fishes and amphibians?

  • a)
    Presence of a single circulation system

  • b)
    Double circulation system

  • c)
    Mixing of deoxygenated and oxygenated blood in the heart

  • d)
    3-chambered heart structure

Correct answer is option 'B'. Can you explain this answer?
Verified Answer
What distinguishes the circulatory pathways in birds and mammals from ...
Birds and mammals have a double circulation system, where oxygenated and deoxygenated blood are kept separate throughout circulation. This setup allows for more efficient delivery of oxygen to the body tissues. In contrast, fishes and amphibians have systems that involve mixing of oxygenated and deoxygenated blood in the heart, leading to less efficient transport of oxygen.
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Most Upvoted Answer
What distinguishes the circulatory pathways in birds and mammals from ...
Key Difference in Circulatory Pathways:
1. Mixing of Deoxygenated and Oxygenated Blood:
- In birds and mammals, there is no mixing of deoxygenated and oxygenated blood in the heart. The heart in these animals has separate chambers for receiving oxygen-poor blood and pumping out oxygen-rich blood, ensuring efficient oxygen delivery to the body.
- On the other hand, fishes and amphibians have a single circulation system where deoxygenated and oxygenated blood can mix in the heart. This can lead to less efficient oxygen delivery to the body tissues.
Therefore, the presence or absence of mixing of deoxygenated and oxygenated blood in the heart is what distinguishes the circulatory pathways in birds and mammals from those in fishes and amphibians.
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What distinguishes the circulatory pathways in birds and mammals from those in fishes and amphibians?a)Presence of a single circulation systemb)Double circulation systemc)Mixing of deoxygenated and oxygenated blood in the heartd)3-chambered heart structureCorrect answer is option 'B'. Can you explain this answer?
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