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Ventricle is incompletely divided in...

Ventricle is incompletely divided in

A

Amphibians

B

Bony fish

C

Cartilaginous fish

D

Reptiles

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Heart Structure in Vertebrates:** - The heart is a vital organ that pumps blood throughout the body. In vertebrates, the heart is divided into chambers to facilitate the separation of oxygenated and deoxygenated blood. 2. **Identifying Heart Structure in Different Groups:** - **Bony Fish:** They possess a two-chambered heart consisting of one atrium and one ventricle. This structure does not allow for the separation of oxygenated and deoxygenated blood. - **Cartilaginous Fish:** Similar to bony fish, they also have a two-chambered heart with one atrium and one ventricle. - **Amphibians:** They have a three-chambered heart, which includes two atria and one ventricle. The ventricle is not completely divided, allowing some mixing of oxygenated and deoxygenated blood. - **Reptiles:** They also have a three-chambered heart with two atria and one ventricle. However, the ventricle in reptiles has a partial septum that incompletely divides it, leading to some mixing of blood. 3. **Conclusion:** - Among the options provided, the only group where the ventricle is incompletely divided is reptiles. Therefore, the correct answer is reptiles. **Final Answer:** The ventricle is incompletely divided in reptiles. ---
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