The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
精
期，精巢小，透明乳白色，生精小管内的生殖以精为主；
The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
精期，精巢小，透明乳白色，生精小管内的生殖以精为主；
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