How many lips surround the mouth in Ascaris ?

Options

A. 2
B. 3
C. 4
D. 6

Answer

To answer the question "How many lips surround the mouth in Ascaris?", we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Organism**: Recognize that Ascaris is a parasitic roundworm, specifically known as Ascaris lumbricoides.

2. **Understand the Mouth Structure**: The mouth of Ascaris is described as a tri-radiated aperture, which means it has three distinct sections.

3. **Count the Lips**: The mouth is surrounded by three lips, which are also referred to as labia.

4. **Identify the Types of Lips**: Among the three lips:
- One is the median dorsal lip.
- The other two are the ventral lateral lips.

5. **Conclusion**: Therefore, the total number of lips that surround the mouth of Ascaris is three.

### Final Answer:
The mouth of Ascaris is surrounded by **3 lips**.

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