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The third layer around spermatophore of ...

The third layer around spermatophore of cockroach is secrete by, When double layered spermatophore is released outside from male genital pore during copulation.

A

Ejactulatory duct

B

Seminal vesicle

C

Long tubules of mushroom gland

D

Phallic gland

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To solve the question regarding the third layer around the spermatophore of a cockroach, we can break it down into the following steps: ### Step-by-Step Solution: 1. **Understanding the Structure of the Spermatophore**: - The spermatophore is a structure that contains sperm and is released by male cockroaches during copulation. It has multiple layers. 2. **Identifying the Layers of the Spermatophore**: - The spermatophore consists of several layers, typically including an inner layer, a middle layer, and an outer layer. Each layer has a specific origin and function. 3. **Recognizing the Glands Involved**: - The glands involved in the formation of the spermatophore include: - **Ejaculatory Duct**: Provides passage for sperm. - **Seminal Vesicle**: Stores sperm. - **Mushroom Gland**: Nourishes the sperm. - **Phallic Gland**: Responsible for secreting the outer layer of the spermatophore. 4. **Determining the Source of the Third Layer**: - The question specifically asks about the third layer of the spermatophore. According to the information provided, the outer layer of the spermatophore is produced by the phallic gland. 5. **Conclusion**: - Therefore, the third layer around the spermatophore of the cockroach is secreted by the **phallic gland**. ### Final Answer: The third layer around the spermatophore of the cockroach is secreted by the **phallic gland**. ---
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