Excretory organ of Balanoglossus is

Options

A. kidney
B. body wall
C. glomerulus
D. gill

Answer

**Step-by-Step Solution:**

1. **Understanding the Organism**: Balanoglossus is a marine organism that belongs to the group of hemichordates. It is important to note that hemichordates have unique anatomical features.

2. **Identifying Excretory Organs**: The excretory organs in various organisms can vary significantly. Common excretory organs include kidneys, body walls, glomeruli, and gills.

3. **Analyzing the Options**:
- **a. Kidney**: Kidneys are primarily found in more developed organisms such as amphibians, reptiles, birds, and mammals. They are not present in Balanoglossus.
- **b. Body Wall**: The body wall serves as an excretory organ in some organisms like earthworms, but it is not the primary excretory organ in Balanoglossus.
- **c. Glomerulus**: The glomerulus is a specialized structure that functions in excretion and is indeed present in Balanoglossus. It is located in front of the central sinus and protrudes through the proboscis coelom.
- **d. Gills**: Gills are primarily associated with aquatic organisms like fishes for respiration and are not the main excretory organ in Balanoglossus.

4. **Conclusion**: After analyzing all the options, the correct answer is **c. Glomerulus**, as it serves as the excretory organ in Balanoglossus.

**Final Answer**: The excretory organ of Balanoglossus is the Glomerulus.

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