Excretion in Phylum Aschelminthes is by .............

Answer

**Step-by-Step Solution:**

1. **Identify the Phylum**: The question is about excretion in the Phylum Aschelminthes, which is also known as Nematoda or roundworms.

2. **Understand the Excretory System**: In Aschelminthes, the excretory system is primarily composed of specialized cells and canals.

3. **Name the Excretory Organ**: The main excretory organ in Aschelminthes is known as the "rennet cell" or "rennet gland."

4. **Function of the Excretory System**: The rennet cells are responsible for the removal of nitrogenous waste, primarily ammonia. In some cases, such as in the organism Ascaris, urea is also excreted.

5. **Conclusion**: Therefore, the excretion in Phylum Aschelminthes is by rennet glands or gland cells.

**Final Answer**: Excretion in Phylum Aschelminthes is by rennet glands.

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