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RRB Group-D Model Paper 14 with answers for online practice
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Question : 22
Total: 100
Which of the following classes of animal has/have a two-chambered heart?
Pisces
Amphibia and Reptilia
Reptilia only
Amphibia only
Validate
Solution:
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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