Atrial and branchial apertures of Herdmania are surrounded by

Options

A. Two lips
B. Three lips
C. Four lips
D. Five lips

Answer

To answer the question regarding the atrial and branchial apertures of Herdmania, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Herdmania**:
- Herdmania, commonly known as sea squirt, is a type of urochordate. It is typically brown in color and lives in marine habitats, often partially buried in sand.

2. **Identifying the Structures**:
- The body of Herdmania has two important structures called the atrial siphon and the branchial siphon. These structures are crucial for the organism's respiratory and excretory functions.

3. **Locating the Apertures**:
- The atrial and branchial apertures are openings that allow water to flow in and out of the body. These apertures are located at the ends of the atrial and branchial siphons.

4. **Surrounding Features**:
- The question specifically asks what surrounds these apertures. Upon examining the anatomy of Herdmania, it is noted that both the atrial and branchial apertures are surrounded by a specific number of lips.

5. **Counting the Lips**:
- It is established that the atrial and branchial apertures are surrounded by **four lips**. This is a distinctive feature of Herdmania.

6. **Choosing the Correct Option**:
- Given the options:
- 2 lips
- 3 lips
- 4 lips
- 5 lips
- The correct answer is **4 lips**.

### Final Answer:
The atrial and branchial apertures of Herdmania are surrounded by **four lips**.

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