The sperm originate in gonial cells (spermatogonia) in the walls of seminiferous tubules.
生于输壁的性母（原）。
声明：以上例句、词性分类均由互联网资源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
Each one is divided into about 250 sections, called lobules, which are loaded with tightly-coiled seminiferous tubules.
每一个都被分成大约 250 个部分，称为小叶，载着密盘精小管。
Now, obviously, if sperm are going to get anything accomplished, they have to leave the seminiferous tubules that made them.
现在，很明显，如果精子想要完成任何事情，它们必须离开制造它们精小管。
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划词翻译
详细解释
生于输
壁的性母
（原）。
理学篇 
载着
密盘
精小管。
