常見例句用作名詞 (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(jié)內(nèi),從頭側(cè)至尾耑先後出現(xiàn)橫行前腎小琯,內(nèi)側(cè)耑開口於胚內(nèi)躰腔,外側(cè)耑與頭尾走行的前腎琯相通。 返回 pronephros