The glands that add their secretions to the sperms are:
1. Seminal vesicles
2. Prostate gland
The secretions of the seminal vesicles and prostate gland together form the fluid part of semen. These secretions serve two main functions:
1. They provide a fluid medium which transports the sperms smoothly through the male reproductive tract.
2. They supply nutrients (like fructose) to the sperms and make the path alkaline, protecting the sperms from the acidic environment of the female reproductive tract.