Whipworm is named so as its

Options

A. Anterior two-third is slender
B. Posterior two-third is slender
C. Anterior one third is slender
D. Posterior one third is slender

Answer

**Step-by-Step Solution:**

1. **Understanding Whipworm**: The whipworm, scientifically known as Trichuris trichiura, is a parasitic roundworm that infects the human intestine. It is commonly associated with a disease known as trichuriasis.

2. **Body Structure**: The whipworm has a distinct body shape that resembles a whip. This is characterized by a thin, elongated anterior (front) end and a thicker, rounded posterior (back) end.

3. **Terminology**: The term "whip" refers to the whip-like appearance of the worm. In this context, "whip" can be likened to a strip of leather that is narrow at one end and wider at the other, which is similar to the shape of the whipworm.

4. **Anatomical Features**:
- The **anterior region** of the whipworm is cylindrical and slender, making up about two-thirds of its body. This part is adapted for attachment to the intestinal wall.
- The **posterior region** is thicker and rounded, containing the reproductive organs and is involved in the worm's life cycle.

5. **Conclusion**: The whipworm is named so because of its whip-like body structure, with a slender anterior end and a thicker posterior end, which is characteristic of its morphology.

**Final Answer**: Whipworm is named so because its body resembles a whip, being slender at the anterior end and thicker at the posterior end.

---