生殖腺开口于近腹部基部，排泄器官通常为马氏管。
The gonads open near the base of the abdomen and the excretory organs are usually Malpighian tubules.
39请不要用你的排泄器官和我说话，这是很不礼貌的，谢谢你！
Please do not use your excretory organs talk to me, this is very rude, thank you!
肾脏是人体主要的排泄器官，它的发育经过原肾、中肾、后肾3个阶段。
The development of the kidney, the major excretory organ after birth, consists of 3 stages:the pronephros, mesonephros and metanephros.
在外胚层和内胚层之间是中胚层，它形成肌肉、生殖腺、血管和排泄器官。
Between the ectoderm and endoderm is mesoderm, which forms the muscles, reproductive organs, blood vessels and excretory organs.
在外胚层和内胚层之间是中胚层，它形成肌肉、生殖腺、血管和排泄器官。
Between the ectoderm and endoderm is mesoderm, which forms the muscles, reproductive organs, blood vessels and excretory organs.
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