The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生精小
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；
,精子细The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生精小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；
声明：以上例
、词
分类均由互联网资源自动生成，部分未经过人工审核，其表达
容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
