Semen

Definition

Semen is the male reproductive fluid containing spermatozoa and secretions from various glands. It is crucial for the transportation, nourishment, and protection of sperm cells during fertilization.

5 Must Know Facts For Your Next Test

1. Semen is produced by the testes, seminal vesicles, prostate gland, and bulbourethral glands.
2. The average volume of semen ejaculated ranges from 2 to 5 milliliters.
3. Semen contains enzymes that help it to liquefy after ejaculation, aiding in sperm motility.
4. The pH of semen is slightly alkaline (around 7.2 to 8.0) which helps neutralize the acidity of the vaginal tract.
5. Sperm cells constitute only about 1-5% of the total volume of semen.

Review Questions

• What are the primary components of semen?
• How does the pH level of semen affect its function?
• Which glands contribute fluids to semen?

Related terms

Spermatozoa: The male gametes or sperm cells involved in fertilization.

Seminal Vesicles: Glands that produce a significant portion of the fluid that becomes part of semen.

Prostate Gland: A gland that secretes fluid that nourishes and protects sperm.