| 单词 | Membranes,Fetal |
| 释义 | Membranes,Fetal《英文msh词典》Membranes,Fetal [入口词] Membranes,Fetal [主题词] Fetal Membranes [英文释义] Thin layers of tissue which surround the embryo or fetus and provide for its nutrition,respiration,excretion and protection; they are the yolk sac,allantois,amnion,and chorion. |
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