Testicles are a part of the male reproductive system. In adult males, these 2 organs are each normally a little smaller than a golf ball. They are contained within a sack of skin called the scrotum, which hangs beneath the base of the penis.
Testicles have 2 main functions:
- They make male hormones, like testosterone.
- They make sperm, the male cells needed to fertilize a female’s egg to start a pregnancy.
Sperm cells form inside the testicle and are then stored in the epididymis a small coiled tube behind each testicle, where they mature.
When a man ejaculates, sperm cells travel from the epididymis through the vas deferens to the seminal vesicles, where they mix with fluids made by the vesicles, the prostate gland, and other glands to form semen. This fluid then travels through the urethra and out through the penis.
Testicular cancer facts
- Males of any age can develop testicular cancer, including infants and elderly men.
- About half of all cases of testicular cancer are in men between the ages of 20 and 34.
- Testicular cancer is not common; a man’s lifetime chance of getting it is about 1 in 263. The risk of dying from this cancer is about 1 in 5,000.
- Testicular cancer can be treated and usually cured, especially when it’s found early – when it’s small and hasn’t spread.