Formation and composition of semen?

Semen is a whitish fluid that is ejaculated from the penis during sexual intercourse or masturbation. It is composed of various substances from different parts of the male reproductive system.

The main components of semen include:

1. Spermatozoa: These are the reproductive cells produced in the testes. Spermatozoa are responsible for fertilizing the female egg during sexual reproduction.

2. Seminal fluid: This is a fluid that provides nourishment and protection to the spermatozoa. It is produced by the seminal vesicles, prostate gland, and bulbourethral glands.

3. Prostate-specific antigen (PSA): This is an enzyme produced by the prostate gland. It helps to liquefy the semen after ejaculation, allowing the spermatozoa to swim freely.

4. Fructose: This is a sugar that provides energy to the spermatozoa. It is produced by the seminal vesicles.

5. Alkaline substances: Semen has an alkaline pH, which helps to neutralize the acidic environment of the vagina, providing a more favorable environment for the spermatozoa.

6. Proteins and enzymes: Semen contains various proteins and enzymes that help in the process of fertilization and provide protection to the spermatozoa.

The exact composition of semen can vary from person to person, but these are the main components that are typically present.