gastrula

Noun
  1. Double-walled stage of the embryo resulting from invagination of the blastula;
    The outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm (synset 101465185)
    is a type of: conceptus, embryo, fertilized egg - an animal organism in the early stages of growth and differentiation that in higher forms merge into fetal stages but in lower forms terminate in commencement of larval life
    has: archenteron - central cavity of the gastrula; becomes the intestinal or digestive cavity

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