Anus opens into a central chamber in vertebrates called

Options

A. Rectum
B. Cloaca
C. Caecum
D. None of the above

Answer

To answer the question "Anus opens into a central chamber in vertebrates called," we will analyze the options provided:

1. **Rectum**:
- The rectum is the lower part of the large intestine. It serves as a passage for waste material to exit the body through the anus. However, it is not considered a central chamber; rather, it is a conduit leading to the anus.
- **Conclusion**: This option is incorrect.

2. **Cloaca**:
- The cloaca is a cavity-like structure found at the end of the digestive tract in many vertebrates. It serves as a common opening for the excretory and reproductive systems, allowing for the expulsion of waste and reproductive products.
- **Conclusion**: This option is correct, as it is indeed a central chamber into which the anus opens.

3. **Cecum**:
- The cecum is the proximal part of the large intestine, located just after the ileum (the last part of the small intestine). It is involved in the absorption of fluids and salts that remain after the intestinal digestion and absorption. However, it does not serve as a central chamber for the anus.
- **Conclusion**: This option is incorrect.

4. **None of the above**:
- Since we have identified that the cloaca is the correct answer, this option does not apply.

**Final Answer**: The anus opens into a central chamber in vertebrates called the **Cloaca**.

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