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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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更新时间:2026/5/1 7:22:32