In the male reproductive system, the major structures that produce the different components of semen are:
1. **Testes**: The testes are responsible for producing sperm cells through a process called spermatogenesis. Sperm cells are a crucial component of semen.
2. **Seminal Vesicles**: These glands produce a significant portion of the fluid that makes up semen. This fluid contains nutrients to nourish and protect sperm cells.
3. **Prostate Gland**: The prostate gland secretes a milky fluid that is a key component of semen. This fluid helps to nourish and support sperm cells.
4. **Bulbourethral Glands**: Also known as Cowper's glands, these glands produce a clear, viscous fluid that lubricates the urethra before ejaculation and helps neutralize any acidity in the urethra.
By working together, these structures contribute to the production of semen, which is the fluid that carries and nourishes sperm cells during ejaculation. Each component plays a vital role in the male reproductive process, ensuring the viability and motility of sperm cells for successful fertilization.
