The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
细
，巢小，透明乳白色，生小管内的生殖细以细为主；
细
The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
细，巢小，透明乳白色，生小管内的生殖细以细为主；
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