Which of the following glands /structure do not participate in excretion in periplaneta americana ?

Options

A. Uricose gland
B. Malpighian tubules
C. Fat body
D. phallic gland

Answer

To solve the question regarding which gland or structure does not participate in excretion in Periplaneta americana (the common cockroach), we can follow these steps:

### Step 1: Understand the Excretory System of Periplaneta americana
Periplaneta americana has a specialized excretory system that includes various glands and structures. The main components involved in excretion are:

- **Malpighian Tubules**: These are the primary excretory structures that filter waste from the hemolymph (blood equivalent) and excrete nitrogenous wastes.
- **Fat Bodies**: These structures store nutrients and can also play a role in excretion by helping to process waste products.
- **Eurychose Gland**: This gland is involved in storing excretory products.

### Step 2: Identify the Glands/Structures Listed
The question lists several glands and structures:
1. Eurychose Gland
2. Malpighian Tubules
3. Fat Bodies
4. Phallic Gland

### Step 3: Analyze Each Gland/Structure
- **Eurychose Gland**: Participates in excretion by storing waste.
- **Malpighian Tubules**: Directly involved in excreting nitrogenous waste.
- **Fat Bodies**: While primarily for storage, they can assist in excretion.
- **Phallic Gland**: This gland is involved in reproduction, specifically in the secretion of spermatozoa, and does not play a role in excretion.

### Step 4: Conclusion
Based on the analysis, the gland that does not participate in excretion in Periplaneta americana is the **Phallic Gland**.

### Final Answer
The correct option is **Phallic Gland**.

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