Topic summary
Spermatozoa
Extracted from the Wikipedia article Sperm.
Origin
Spermatozoa are produced in the seminiferous tubules of the testicles in a process called spermatogenesis. Round cells called spermatogonia divide and differentiate eventually to become spermatozoa. During copulation, the cloaca or vagina gets inseminated, and then the spermatozoa move through chemotaxis to the ovum inside an oviduct.