Question
Download Solution PDFWhich of the following classes of animal has/have a two-chambered heart?
Answer (Detailed Solution Below)
Option 1 : Pisces
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UPSC CDS 01/2025 General Knowledge Full Mock Test
120 Qs.
100 Marks
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Detailed Solution
Download Solution PDFThe correct answer is Option 1, i.e Pisces.
Key Points
- Pisces have a two-chambered heart that has one auricle and one ventricle.
- Fish have a single circuit for blood flow and a two-chambered heart that has only a single atrium and a single ventricle.
- Amphibians have a three-chambered heart that has two atria and one ventricle rather than the two-chambered heart of fish.
- Reptiles, except crocodile, have three chambered heart.
- Blood from the ventricle travels to the lungs and skin where it is oxygenated and also to the body.
- In the ventricle, deoxygenated and oxygenated blood are mixed before being pumped out of the heart.
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