The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
精子

输精管壁的性母细胞(精原细胞)。
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In the series between the extreme perfection of the cells of the hive-bee and the simplicity of those of the humble-bee, we have the cells of the Mexican Melipona domestica, carefully described and figured by Pierre Huber.
在蜂巢蜂细胞的极端完美与蜜蜂细胞的简
性之间的系列中,我们有墨西哥 Melipona domestica 的细胞, 由 Pierre Huber 仔细描述和计算。