The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生小管内有处于不同发育时期的原细,初级母细,次级母细,子细和子;
The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生小管内有处于不同发育时期的原细,初级母细,次级母细,子细和子;
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