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In the male reproductive system of cockr...

In the male reproductive system of cockroaches, which of the following structures represents the external genitalia?

A

Gonopore

B

Vas deferens

C

Phallomere

D

Ejaculatory duct

Text Solution

AI Generated Solution

The correct Answer is:
To solve the question regarding the external genitalia in the male reproductive system of cockroaches, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Male Reproductive System of Cockroaches**: - The male reproductive system consists of various structures including testes, vas deferens, ejaculatory duct, and external genitalia. 2. **Identify Key Structures**: - The **vas deferens** are two fine ducts that arise from the testes and lead to the ejaculatory duct. However, they do not represent external genitalia. - The **ejaculatory duct** is an elongated muscular tube that opens to the outside but is not considered external genitalia itself. 3. **Locate the External Genitalia**: - The external genitalia in male cockroaches is represented by structures known as **phallomeres** (also referred to as male gonapophysis). - These phallomeres are chitinous structures that surround the male genital pore (gonopore). 4. **Confirm the Structure**: - There are three phallomeres: right, left, and ventral. They are responsible for the external appearance and function of the male reproductive system. 5. **Conclude the Answer**: - Based on the identification and confirmation of the structures, the correct answer to the question is **phallomeres** (Fallomia). ### Final Answer: The structure that represents the external genitalia in the male reproductive system of cockroaches is **phallomeres** (Fallomia). ---
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