Seminal vesicles

Definition

Seminal vesicles are a pair of glands located near the base of the bladder in males that produce a significant portion of the seminal fluid, which is crucial for reproduction. These glands secrete a viscous fluid rich in fructose and other nutrients that nourish sperm and help facilitate their mobility during ejaculation. By contributing to the formation of semen, seminal vesicles play an essential role in the male reproductive system and the overall process of gametogenesis.

5 Must Know Facts For Your Next Test

1. Seminal vesicles contribute approximately 60-70% of the total volume of semen, making them a crucial component in male fertility.
2. The fluid produced by seminal vesicles contains high levels of fructose, which provides energy for sperm motility as they travel through the female reproductive tract.
3. In addition to fructose, seminal vesicle secretions also include prostaglandins, which help to stimulate contractions in the female reproductive tract, aiding sperm transport.
4. Dysfunction or diseases affecting the seminal vesicles can lead to infertility due to inadequate semen production or altered sperm motility.
5. During ejaculation, the muscle contractions of the seminal vesicles help propel their secretions into the ejaculatory duct, mixing with sperm from the testes to form semen.

Review Questions

• How do seminal vesicles contribute to male fertility and gametogenesis?
  • Seminal vesicles play a vital role in male fertility by producing a significant portion of seminal fluid, which is essential for nourishing sperm. The fluids secreted by these glands contain nutrients like fructose that provide energy for sperm motility. By contributing to the composition of semen, seminal vesicles ensure that sperm can effectively reach and fertilize an egg, thus facilitating successful reproduction.
• Discuss the relationship between seminal vesicle function and conditions that may affect male reproductive health.
  • The function of seminal vesicles is closely linked to overall male reproductive health. Conditions such as infections, blockages, or tumors can impair their ability to produce seminal fluid. This can result in decreased semen volume or altered fluid composition, which negatively impacts sperm viability and motility. Consequently, such issues can lead to difficulties in achieving conception, highlighting the importance of healthy seminal vesicle function.
• Evaluate how changes in diet or lifestyle might influence the function of seminal vesicles and overall male reproductive health.
  • Diet and lifestyle choices can significantly influence the function of seminal vesicles and overall male reproductive health. A diet high in antioxidants and healthy fats can improve semen quality by enhancing blood flow and hormone levels necessary for optimal gland function. Conversely, poor lifestyle choices such as excessive alcohol consumption, smoking, and lack of exercise can lead to hormonal imbalances or inflammation that negatively affect seminal vesicle health. By adopting healthier habits, men may improve their reproductive potential by supporting the proper functioning of these vital glands.

Related terms

prostate gland:

A gland in males that produces a fluid that nourishes and protects sperm within semen, playing a key role in male fertility.

spermatozoa:

The mature male reproductive cells or sperm that are produced in the testes and are responsible for fertilizing the female egg.

ejaculatory duct: A duct formed by the merger of the vas deferens and the seminal vesicle, which carries sperm and seminal fluid to the urethra during ejaculation.