The scrotum is a pouch of skin located behind the penis that contains the testicles. Its primary function is to regulate the temperature of the testicles, which is essential for sperm production. The scrotum can contract or relax to maintain an optimal temperature, keeping the testicles slightly cooler than the body's core temperature. The scrotum is part of the male reproductive system and plays a crucial role in male fertility. It is composed of skin and muscle tissue, allowing it to adjust its position. Proper functioning of the scrotum is important for overall reproductive health and is often examined during routine check-ups by healthcare professionals.