Sperm spend their life in the male body in a continuous series of tubes much like the plumbing (water pipes) in a house. Spermatogenesis occurs in the testes after which the full formed sperm leave the seminiferous tubules to enter the epididmyus where they remain stored until the appropriate moment. Certain secretions are released in the epididymus that alter the sperms environment and its surface characteristics, among other things. In preparation for ejaculation, the sperm leaving the epididymus enter the vasa efferentia. The sperm move along each vas deferens and enter the vas deferens. As the sperm move along the vas deferens material are added to the sperm and to the extracellular fluid (forming semen) that surrounds them. The prostate gland and seminal vesicles add fluid (forming semen) that surrounds them. The prostate gland and seminal vesicles add fluid and nutrients at the time of sperm ejaculation providing most of the volume of the ejaculate. This complex of fluid and sperm cells (semen) travels up the urethra to be released externally though the penis.
Glands and Secretions
Epididymus: Stores sperm from seminiferous tubules; adds secretions; adds surface glycoprotein to sperm.
Prostate gland and seminal vesicles: add fluid, nutrients, etc. at the time of ejaculation of the semen.
Testosterone secreted by testes is responsible for development of male secondary sex characters and desire to have sex and attraction towards opposite sex.
Night Falls or Wet Dreams
In adolescent boys, once sperm formation starts and semen is formed, it sometimes gets ejaculated during sleep even without sexual intercourse. This is called night fall and is a normal growing up process. In absence of its knowledge, it is of great concern and worry for boys.
Counsel about hygiene in boys
• Wash genitals daily.
• Gently retract foreskin back and wash the tip of the penis. Secretions accumulate under the foreskin and could cause infection if not cleaned regularly.
• Change underwear daily.
• Use cotton undergarment only. Synthetic garments to not absorb moisture and also increase the temperature.
• Wash undergarment everyday and dry in the sun.