The embryonic stage of development in which the cells form a double-layered hollow sphere.<\/p>\n
The second stage of the development of an embryo.<\/p>\n
Early stage in embryo development occurring after the blastula stage; the gastrula is a hollow, cup-shaped structure consisting of an outer ectoderm layer and an inner layer that later differentiates into two layers (endoderm and mesoderm).<\/p>\n
An early stage in the development of many animal embryos. It consists of a double-layered ball of cells formed by invagination and movement of cells in the preceding single-layered stage (blastula) in the process of gastrulation. It contains a central cavity, the archenteron, which opens through the blastopore to the outside. True gastrulation only occurs in the embryos of amphibians and certain fish, but a similar process occurs in the embryonic disk in other vertebrates, including man.<\/p>\n
The stage in embryonic development following the blastula in which the embryo assumes a two-layered condition. The outer layer is the ectoderm or epiblast; the inner layer, the endoderm or hypoblast. The latter lines a cavity, the gastrocoele or archenteron, that opens to the outside through an opening, the blastopore.<\/p>\n
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The embryonic stage of development in which the cells form a double-layered hollow sphere. The second stage of the development of an embryo. Early stage in embryo development occurring after the blastula stage; the gastrula is a hollow, cup-shaped structure consisting of an outer ectoderm layer and an inner layer that later differentiates into two […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":["post-61863","post","type-post","status-publish","format-standard","hentry","category-g"],"yoast_head":"\n