Function of Pampiniform Plexus

The function of the pampiniform plexus of the testes is:

Correct Answer: Thermoregulation

The pampiniform plexus is a network of veins that surround the testicular artery in the spermatic cord. Its primary function is thermoregulation — it acts as a counter-current heat exchange system to keep the testes at a temperature 4–5°C lower than body temperature, which is essential for normal spermatogenesis.

Mechanism

• Warm arterial blood coming from the body core is cooled by the cooler venous blood returning from the testes.
• This counter-current exchange maintains testicular temperature lower than body core temperature.

Clinical Significance

• Failure of thermoregulation (e.g., cryptorchidism — undescended testes) leads to infertility due to impaired spermatogenesis at elevated temperatures.
• Scrotal hernia, hydrocele or fever can also impair thermoregulation and affect fertility.