The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
子产于输管壁的性母细胞(原细胞)。
The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
子产于输管壁的性母细胞(原细胞)。
The testis at spermatogonium phase is small and transparent, and the spermatogenetic cells in seminiferous tubule primarily consist of spermatogonia;
原细胞期,巢小,透色,小管的殖细胞以原细胞为主;
The testis at spermatid phase develops continually, and is deep in color, and the spermatogenetic cells in seminiferous tubule are primarily composed of spermatids.
细胞期,巢体积继续增大,颜色加深,小管的殖细胞以细胞为主;
The spermatogonia in the seminiferous tubules of testis are on four different stages, including primary spermatocytes, secondary spermatocytes, spermatoon, and spermatozoa.
小管有处于不同发育时期的原细胞,初级母细胞,次级母细胞,子细胞和子;
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