The scrotum helps in maintaining the low temperature of the testes

Options

A. `4-4.5^(@) C` temperature higher than body temperature to facilitate spermatogenesis .
B. `3-3.5^(@) C`temperature higher than body temperature to facilitate spermiogenesis .
C. `2-2.5^(@) C` temperature lower than body temperature to facilitate spermatogenesis .
D. `5-5.5^(@) C` temperature lower than body temperature to facilitate spermiogenesis .

Answer

### Step-by-Step Solution:

1. **Understanding the Role of the Scrotum**:
- The scrotum is a pouch-like structure that holds the testes outside the body. This positioning is crucial for the proper functioning of the testes.

2. **Temperature Requirement for Spermatogenesis**:
- Spermatogenesis, the process of sperm production, requires a temperature that is lower than the normal body temperature. The ideal temperature for this process is approximately 2 to 2.5 degrees Celsius lower than the body temperature.

3. **Location of the Testes**:
- The testes are located in the scrotal sacs, which are positioned outside the abdominal cavity. This external placement is essential for maintaining the lower temperature needed for sperm development.

4. **Development of Testes**:
- During fetal development, the testes initially form in the abdominal cavity. They descend into the scrotal sacs around the seventh month of fetal life, influenced by the hormone testosterone.

5. **Conclusion**:
- Therefore, the scrotum plays a vital role in ensuring that the temperature of the testes is maintained at a lower level, facilitating optimal conditions for spermatogenesis.

### Final Answer:
The scrotum helps in maintaining the low temperature of the testes, which is essential for spermatogenesis to occur effectively.