extraembryonic的用法和样例：
词汇搭配
- extraembryonic blastoderm 胚外胚盘
- extraembryonic membrane 胚外膜
- extraembryonic circulation 胚外循环
- extraembryonic field 胚外区
- extraembryonic endoderm 胚外内胚层
- extraembryonic vessel 胚外血管
- extraembryonic capillary network 胚外毛细血管网...
- extraembryonic endothelium 胚体外内皮
- extraembryonic coelom 胚外体腔
- extraembryonic cavity 胚外腔
- extraembryonic somatopleuric mesoderm 胚外体壁中胚层...
- extraembryonic ectoderm 胚外外胚层
- extraembryonic mesoderm 胚外中胚层
