proamnion

前羊膜

词形变化

proamnions 复数 proamnia 复数

释义与例句

n.
  1. 1.

    An area of the blastoderm at the cephalic end of a vertebrate embryo, in which there is no mesoderm separating the ectoderm and endoderm

词源

From pro- + amnion.

来源：wiktionary