The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
细胞期，巢小，透明乳白
，
小管内的殖细胞以细胞为主；
细胞The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
细胞期，巢小，透明乳白，小管内的殖细胞以细胞为主；
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