The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
子产生于输管壁的性母(原)。
The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
子产生于输管壁的性母(原)。
The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
原期,巢小,透明乳白色,生小管的生殖以原为主;
The testis at spermatid phase develops continually, and is deep in color, and the spermatogenetic cells in seminiferous tubule are primarily composed of spermatids.
期,巢体积继续增大,颜色加深,生小管的生殖以为主;
The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生小管有处于不同发育时期的原,初级母,次级母,子和子;
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