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A cell of the last or next to the last generation of male germ cells which differentiates to form spermatozoa.



a male sexual cell derived from a spermatogonium. Two types of spermatocytés are distinguished: primary and secondary. Primary spermatocytes develop during the growth period, and secondary spermatocytés during the second meiotic division. The latter subsequently give rise to spermatids.

References in periodicals archive ?
PSC = primary spermatocyte; SSC = secondary spermatocyte; ST = spermatid; SPZ = spermatozoa; SZ = spermatozeugmata.
Class II Early Maturation (146.427 [+ or -] 5.694 [micro]m): Tubules in the distal, middle and proximal areas show a continuous germinal epithelium, which is 34.81 [micro]m in height, [+ or -] 1.281 consisting of germ cysts in all stages of development (spermatogonia, primary and secondary spermatocytes and spermatids).
Primary and secondary spermatocytes and spermatids were also present in both fish.
tuberosum treatment, effects on secondary spermatocytes and round spermatids was assessed, elongated spermatids at 14 days treatment, spermiation and sperm transit through epididymis at 7 days treatment (Pina-Guzman et al.
Hence, a significant reduction in spermatogonia, spermatids and secondary spermatocytes was observed in the TD group.
The FSH is responsible for the development of spermatogonia to secondary spermatocytes through different stages namely spermatogonia, spermatids, sertoli cells and secondary spermatocytes.
Once meiosis I is completed (layer four; stage IV), secondary spermatocytes develop.
Population of preleptotene, pachytene, secondary spermatocytes and step-19 spermatid were declined by 60.86%, 65.81%, 71.56% and 66.55%, respectively.
Primary spermatocytes, secondary spermatocytes, spermatids, and differentiating spermatozoa extend, in that order, from the gonadal wall luminally between NPs (Fig.
Analysis of secondary spermatocytes (MII configurations) was complicated by the possible number and morphologies of the elements.
Primary spermatocytes complete the first divisions of the meiosis that produces secondary spermatocytes. Secondary Secondary spermatocytes are smaller than primary spermatocytes spermatocytes.