The primary germ layers are the ectoderm, mesoderm, and endoderm. Primordial germ cells are typically considered distinct from primary germ layers, although all are derived from the inner cell mass of the embryo.
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The primary germ layers are the ectoderm, mesoderm, and endoderm. Primordial germ cells are typically considered distinct from primary germ layers, although all are derived from the inner cell mass of the embryo.
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