Definition
The testicular vein is a vein that drains blood from the testicles in males. It's like a pathway carrying blood back towards the heart from the lower body. On the right side, it drains directly into the inferior vena cava, while on the left, it drains into the left renal vein. Its primary function is to regulate the temperature of the testicles, which is crucial for sperm production. Any issues can lead to infertility.