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endoderm
The "lower" layer of the embryo, as the inner cell mass forms a circular disk two cells thick; with further embryonic development it gives rise to the digestive tract and its glands. Synonym: hypoblast.
Terms that contain "endoderm" in the definition
mesoderm
The third, or 'middle' layer of the developing tissues of the early embryo, forming between the ectoderm and the endoderm during the transformation of the embryo known as gastrulation; mesoderm gives rise to the body's muscles, bones and various connecting tissues.