Opening of rectum in amphibians is termed as

Options

A. Cochlea
B. Cloaca
C. Coccyx
D. None of these

Answer

To solve the question regarding the opening of the rectum in amphibians, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that we are discussing amphibians, which are a class of animals that can live both in water and on land. A common example of an amphibian is the frog.

2. **Understand the Anatomy of Amphibians**: In amphibians like frogs, the digestive and excretory systems are structured differently compared to mammals. Notably, amphibians do not have a separate anus as mammals do.

3. **Define the Opening of the Rectum**: In the absence of a distinct anus, amphibians have a common opening for the excretory and reproductive systems. This opening is crucial for the elimination of waste and the expulsion of reproductive products.

4. **Identify the Correct Term**: The term used to describe this common opening in amphibians is "Cloaca." The cloaca serves as a passage for waste from the digestive system and also for reproductive products from the urogenital system.

5. **Conclusion**: Therefore, the answer to the question is that the opening of the rectum in amphibians is termed as "Cloaca."

### Final Answer:
The opening of the rectum in amphibians is termed as **Cloaca**.

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