Sperm is the male reproductive cell an is derived frae the Greek wird (σπέρμα) sperma (meaning "seed"). In the teeps o sexual reproduction kent as anisogamy an its subteep oogamy, thare is a merked difference in the size o the gametes wi the smawer ane bein termed the "male" or sperm cell. A uniflagellar sperm cell that is motile is referred tae as a spermatozoon, whauras a non-motile sperm cell is referred tae as a spermatium. Sperm cells canna divide an hae a leemitit life span, but efter fusion wi egg cells in fertilisation, a new organism begins developin, stairtin as a totipotent zygote. The human sperm cell is haploid, sae that its 23 chromosomes can jyne the 23 chromosomes o the female egg tae form a diploid cell. In mammals, sperm develops in the testicles, stored in the epididymis, an is released frae the penis.