Cloaca of Rana receives

Options

A. alimentary canal
B. urinary tract
C. reproductive tract
D. all of these

Answer

### Step-by-Step Solution:

1. **Understanding the Cloaca**: The cloaca is a common cavity at the end of the digestive tract in certain animals, including frogs (Rana). It serves as a passage for excretion and reproduction.

2. **Components of the Cloaca**: The cloaca receives waste from multiple systems:
- **Elementary Canal**: The cloaca is connected to the large intestine, which is part of the digestive system. It receives fecal matter from the digestive tract.
- **Urinary Tract**: The cloaca also receives urine from the ureters and urinary bladder, which are part of the excretory system.
- **Reproductive Tract**: In female frogs, the cloaca receives eggs from the oviducts, which are part of the reproductive system.

3. **Function of the Cloaca**: The cloaca acts as a storage area for waste materials and reproductive cells. It temporarily holds these substances before they are expelled from the body through the cloacal aperture.

4. **Conclusion**: Since the cloaca receives contributions from the elementary canal, urinary tract, and reproductive tract, the correct answer to the question "Cloaca of Rana receives" is "all of this" or "all the above".

### Final Answer:
The cloaca of Rana receives:
- Elementary canal
- Urinary tract
- Reproductive tract
- Therefore, the answer is: **All of this**.

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