Associations to the word «Gastrula»

GASTRULA, noun. (embryology) A stage in the development of embryos of most animals consisting of a two-layered sac of ectoderm and endoderm.

GASTRULA, noun. 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.