What is the primary function of the seminal vesicles?

The primary function of the seminal vesicles is to secrete fluid containing fructose, which is crucial for sperm motility and viability. The fructose provides an energy source for sperm as they travel through the female reproductive tract. This sugary fluid makes up a significant portion of semen and helps to nourish sperm on their journey to fertilize an egg. The alkaline nature of the seminal vesicles’ secretion also aids in neutralizing the acidic environment of the male urethra and female vagina, creating a more favorable condition for sperm survival.

Other components produced by different structures in the male reproductive system contribute to the overall function of semen, but the seminal vesicles specifically enhance sperm accessibility and movement through their nutrient-rich fluid.