The final moult of the rhabditiform larva of Ascaris occurs in human

Options

A. heart
B. liver
C. intestine
D. lungs

Answer

To answer the question regarding where the final moult of the rhabditiform larva of Ascaris occurs in humans, we can break down the process step by step:

### Step-by-Step Solution:

1. **Understanding Rhabditiform Larva**:
- The rhabditiform larva is a developmental stage of Ascaris, which is a type of roundworm (nematode). This larval form is characteristic of nematodes.

2. **Moult Definition**:
- "Moult" refers to the process where an organism sheds its exoskeleton or outer covering to grow. In the case of Ascaris, this involves several stages of development.

3. **Life Cycle of Ascaris**:
- Ascaris is an intestinal parasite in humans. The larvae hatch from eggs in the intestine and undergo several developmental stages.

4. **Migration of Larvae**:
- After hatching, the larvae penetrate the intestinal wall and enter the bloodstream. They travel through the liver and then to the heart.

5. **Pulmonary Circulation**:
- From the heart, the larvae are carried to the lungs via pulmonary circulation. This is where they undergo a series of molts.

6. **Final Moult Location**:
- After the larvae mature in the lungs, they migrate back to the intestine. The final moult occurs in the intestine, where they mature into adult worms.

7. **Conclusion**:
- Therefore, the final moult of the rhabditiform larva of Ascaris occurs in the intestine.

### Final Answer:
- The final moult of the rhabditiform larva of Ascaris occurs in the **intestine** (Option C).

---