Which of the following glands produces a fluid that makes up most of the volume of semen?

The seminal vesicles are a pair of glands located near the base of the bladder in the male reproductive system. They produce a fluid that makes up about 60-70% of the volume of semen. This fluid contains fructose, enzymes, and other substances that nourish and activate spermatozoa, helping them to survive and function properly in the female reproductive tract. The fluid also contains prostaglandins, which help to stimulate contractions in the female reproductive tract that aid in the movement of spermatozoa towards the egg.