The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
精小管内有处于不同发育时期的精原细,初级精母细,次级精母细,精子细和精子;
The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
精小管内有处于不同发育时期的精原细,初级精母细,次级精母细,精子细和精子;
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