Spermato
genesis
un
seel
.com · seminiferous tubule · meiosis · spermiogenesis
stage
spermatogonia
ploidy
2n diploid
day
0
of ~64
step
—
spermatogonia (2n, stem)
spermatocytes (meiosis)
spermatids → sperm (n)
Sertoli cells / tubule wall
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Un
seel
.com · Spermatogenesis