In many mammals, the testes are located outside the abdominal cavity within the scrotum because __________.

• A. the elevated pressure within the abdominal cavity would collapse the small passageways within the testes
• B. this location allows for a shorter pathway to the urethra
• C. blood flow to the scrotum is not interrupted during erection
• D. of all of the listed reasons
• E. sperm are unable to mature properly at the higher temperatures found within the abdominal cavity

Answer: (E)

Verified step by step guidance

1. Understand the role of the testes in mammals: The testes are responsible for producing sperm and hormones like testosterone.
2. Recognize the importance of temperature in sperm production: Sperm production and maturation require a temperature slightly lower than the normal body temperature.
3. Identify the function of the scrotum: The scrotum acts as a climate control system for the testes, keeping them cooler than the body's core temperature.
4. Consider the anatomical location: The testes are located outside the abdominal cavity in the scrotum to maintain an optimal temperature for sperm development.
5. Conclude with the reason: The primary reason for the testes being outside the abdominal cavity is to ensure that sperm can mature properly at a cooler temperature than that found inside the body.