用germ layer造句子，“germ layer”造句

3、RESULTS: (1) the ESC-D3 cells kept the ability of differentiation into cellular derivations of all three primary germ layers after continuous passage culture.

1、The layer of cells formed by the cleavage of a fertilized mammalian later divides into the three germ layers from which the embryo develops.

2、Having three germ layer of the vertebrate embryo.