+The **endoderm** is the innermost of the three primary [germ layers](/wiki/germ_layer) in early embryonic development. This foundational layer gives rise to many vital internal structures, including the lining of the [digestive system](/wiki/digestive_system) and respiratory tracts, as well as glandular organs like the liver and pancreas.
+## See also
+- [Ectoderm](/wiki/ectoderm)
+- [Mesoderm](/wiki/mesoderm)
+- [Embryo](/wiki/embryo)
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