What is the function of scrotal sacs?

Explanation

### Step-by-Step Solution:

1. **Location and Structure**: The scrotal sacs are external pouches located beneath the penis in males. They house the testes, which are crucial for male reproduction.

2. **Role of Testes**: The primary function of the testes is to produce sperm through a process called spermatogenesis. This process is essential for male fertility.

3. **Temperature Regulation**: For optimal sperm production, the temperature within the scrotal sacs must be lower than the normal body temperature. The ideal temperature for spermatogenesis is approximately 2 degrees Celsius lower than the body's core temperature.

...