Sperm cells are formed in the seminiferous tubules of the testes
The process, known as spermatogenesis, begins with stem cells called spermatogonia, which develop into mature sperm cells over several weeks.
Once formed, sperm move to the epididymis, Here, sperm mature and gain the ability to swim, which is essential for fertilization. Mature sperm are stored in the epididymis and are eventually transported through the vas deferens during ejaculation. Sperm is mixed with fluids from the seminal vesicles, prostate gland, and bulbourethral glands to form semen.