The cell that undergoes two meiotic divisions to form four spermatids.
An early stage in the development of a spermatozoon.
A cell produced as an intermediate stage in the formation of spermatozoa. Spermatocytes develop from spermatogonia in the walls of the seminiferous tubules of the testis; they are known as either primary or secondary spermatocytes according to whether they are undergoing the first or second division of meiosis.
A cell originating from a spermatogonium that divides to form spermatids, which become spermatozoa.
The primary cell within the testicle from which the spermatozoon (sperm cell) develops.