The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
精子产生于输精管壁的胞(精原胞)。
The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
精子产生于输精管壁的胞(精原胞)。
The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
精原胞期,精巢小,透明乳白色,生精小管的生殖胞以精原胞为主;
The testis at spermatid phase develops continually, and is deep in color, and the spermatogenetic cells in seminiferous tubule are primarily composed of spermatids.
精胞期,精巢体积继续增大,颜色加深,生精小管的生殖胞以精胞为主;
The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
生精小管有处于不同发育时期的精原胞,初级精胞,次级精胞,精子胞和精子;
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