Labium majora of a female mammal is homologous to

Options

A. scrotal sac
B. prostate gland
C. epididymis
D. seminal vesicle

Answer

**Step-by-Step Solution:**

1. **Understanding the Labium Majora**: The labium majora refers to the outer folds of skin that form part of the female external genitalia, known as the vulva. These structures are important for protecting the internal reproductive organs.

2. **Identifying Homologous Structures**: In biology, homologous structures are those that have a similar origin but may serve different functions in different species. In this case, we are looking for a male structure that is homologous to the labium majora.

3. **Analyzing the Options**:
- **Scrotal sac**: This is the pouch of skin that contains the testes in males. It is formed from the same embryonic tissue as the labium majora.
- **Prostate gland**: This is a gland that produces seminal fluid, not homologous to labium majora.
- **Epididymis**: This is a structure where sperm mature, not homologous to labium majora.
- **Seminal vesicle**: This gland produces a component of semen, not homologous to labium majora.

4. **Conclusion**: The labium majora is homologous to the scrotal sac in males. This is because both structures develop from the same embryonic tissue and serve protective functions for the reproductive organs.

**Final Answer**: The labium majora of a female mammal is homologous to the scrotal sac.

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