embryonic membrane

Noun
  1. The inner membrane of embryos in higher vertebrates (especially when covering the head at birth) (synset 105318121)
    is a type of: fetal membrane - any membrane that functions for the protection or nourishment or respiration or excretion of a developing fetus
    is a part of: placenta - the vascular structure in the uterus of most mammals providing oxygen and nutrients for and transferring wastes from the developing fetus
    same as: caul, veil

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