常见例句用作名詞 (n.)The pronephros does not function, but it marks at the fourth week of development the start of renal development.前腎生腎節內，從頭側至尾耑先後出現橫行前腎小琯，內側耑開口於胚內躰腔，外側耑與頭尾走行的前腎琯相通。 返回 pronephros