Seminal plasma in humans is rich in

Seminal plasma in humans is rich in fructose, calcium and certain enzymes.

Semen is a complex mixture, consisting of sperm and various seminal fluids secreted by the male reproductive system's accessory sex glands. This includes the seminal vesicles, which contribute around 60% of semen's volume, secreting an alkaline fluid containing fructose, prostaglandins, and clotting proteins to support sperm vitality, motility, and protection within the female reproductive tract. The prostate gland, while contributing 25% of semen's volume, secretes a slightly acidic fluid containing citric acid for ATP production, proteolytic enzymes to break down seminal vesicle clotting proteins, acid phosphatase, and an antibiotic called seminalplasmin. Lastly, the bulbourethral glands release an alkaline fluid and mucus into the urethra during sexual arousal, neutralising acids, lubricating the penis and urethra, and reducing sperm damage during ejaculation. Semen's overall composition provides sperm with a transport medium, nutrients, and protection against the hostile environments of the male urethra and female vagina, facilitating successful fertilization.