1. Testes (Gonads):
* Primary Function: Produce sperm cells (gametes) and testosterone.
* Sperm production: Located in the scrotum, testes contain seminiferous tubules where spermatogenesis occurs, the process of creating sperm.
* Testosterone production: Leydig cells within the testes produce testosterone, the primary male sex hormone responsible for developing and maintaining male sexual characteristics, muscle mass, and bone density.
2. Accessory Glands:
* Seminal Vesicles:
* Function: Produce a thick, yellowish fluid that makes up about 60% of semen. This fluid contains fructose, a sugar that provides energy for sperm, as well as prostaglandins which promote smooth muscle contractions in the female reproductive tract.
* Prostate Gland:
* Function: Produces a milky, slightly acidic fluid that contributes about 30% of semen. It contains enzymes that help liquefy semen after ejaculation, making it easier for sperm to swim.
* Bulbourethral Glands (Cowper's Glands):
* Function: Secrete a clear, viscous mucus-like fluid that lubricates the urethra before ejaculation, neutralizing any traces of acidic urine that might harm sperm.
3. Other Structures:
* Epididymis:
* Function: A coiled tube attached to each testis where sperm mature and are stored for up to several weeks.
* Vas Deferens:
* Function: A muscular tube that carries mature sperm from the epididymis to the ejaculatory duct.
* Ejaculatory Duct:
* Function: The final pathway for sperm to travel through, joining the urethra at the prostate gland.
* Urethra:
* Function: The tube that carries urine from the bladder and also serves as the passageway for semen during ejaculation.
In summary, the glands in the male reproductive system work in a coordinated manner to produce, nourish, and transport sperm, ultimately enabling successful fertilization.
