
Testis
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Spermatogonia
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Primary spermatocytes
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Spermatids (early)
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Spermatids (late)
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Sperm
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

- Flagella
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X

Sertoli cells
Spermatogenesis has four phases: spermatocytogenesis (mitotic division of spermatogonia to primary spermatocytes); meiosis (a two-step division of primary spermatocytes to secondary spermatocytes to spermatids); spermiogenesis (cytodifferentiation of spermatids into mature spermatozoa); and spermiation (the release of sperm from Sertoli cells). 1000X