Question
Download Solution PDFWhich of the following pairs has a double circulation pathway?
Answer (Detailed Solution Below)
Detailed Solution
Download Solution PDFThe correct answer is birds and Mammals.
- Birds and Mammals have a double circulatory pathway.
Key Points
- No, mixing of oxygenated and deoxygenated blood in this pathway.
- The ventricles pump it out without mixing which means two separate circulatory pathways are present in these organisms.
- Hence, these animals have double circulation.
- Fishes have single circulatory pathways of circulation which's why known as a single circulation system.
- In this system oxygenated blood is supplied to the body from where deoxygenated blood is returned to the heart.
- In Amphibian and reptiles has incomplete circulation.
- Here oxygenated and deoxygenated blood gets to mix up within the single ventricle.
Additional Information
- Types of Circulation and Heart
| Characters | FIshes | Amphibians | Reptiles | Crocodile | Aves | Mammals |
|---|---|---|---|---|---|---|
| No of heart chambers | 2 | 3 | 3 | 4 | 4 | 4 |
| Atria | 1 | 2 | 2 | 2 | 2 | 2 |
| Ventricles | 1 | 1 | 1 | 2 | 2 | 2 |
| Type of circulation | Single | Transitional double | Transitional double | Double | Double | Double |
Last updated on Jun 27, 2025
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