Adult of Wuchereria bancrofit attacks

Options

A. Nervous system
B. Blood vessels
C. Excretory system
D. Lymph vessels

Answer

### Step-by-Step Solution:

1. **Identify the Organism**:
- Wuchereria bancrofti is a type of nematode worm, also known as a roundworm.

2. **Understand the Disease**:
- This organism causes a disease known as lymphatic filariasis.

3. **Life Cycle and Behavior**:
- The adult form of Wuchereria bancrofti primarily affects the lymphatic system.
- During the daytime, these worms reside in deep veins, while at night, they migrate to the lymphatic vessels.

4. **Location of Attack**:
- In its adult form, Wuchereria bancrofti invades the lymphatic vessels where it completes its life cycle.

5. **Evaluate Options**:
- The question provides several options regarding the system affected by Wuchereria bancrofti in its adult form:
- Nervous System: Incorrect
- Blood Vessels: Incorrect (only in larval form)
- Excretory System: Incorrect
- Lymphatic Vessels: Correct

6. **Conclusion**:
- The correct answer is that Wuchereria bancrofti attacks the lymphatic vessels in its adult form.