Which of the following describes the function of the skin bag which encloses the testis ?

Options

A. It synthesises and secretes testicular harmones called androgens.
B. It provides nutrition to be germ cells.
C. It maintains the low temperature of the testes necessary fore spermatogenesis.
D. It is made up of a special tissues that helps in erection of the penis to facilitate insemination.

Answer

To answer the question regarding the function of the skin bag that encloses the testis, we will follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure**: The skin bag that encloses the testis is known as the **scrotum**. It is a pouch-like structure located behind the penis.

2. **Function of the Scrotum**: The primary function of the scrotum is to **protect the testicles**. It serves as a protective covering for the testis.

3. **Temperature Regulation**: The scrotum plays a critical role in maintaining the **temperature of the testicles**. For spermatogenesis (the process of sperm production) to occur effectively, the temperature of the testicles must be **lower than the normal body temperature** (approximately 2 degrees Celsius cooler).

4. **Conclusion**: Given the options provided in the question, the correct description of the function of the scrotum is that it **maintains the low temperature of the testes necessary for spermatogenesis**.

### Final Answer:
The correct option is: **It maintains the low temperature of the testes necessary for spermatogenesis.**

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