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Embryo Development

Embryology and Development

QuestionAnswer
Gametes Sex cells
Fertilization The combination of male and female gametes (sex cells)
Zygote A fertilized egg
Embryology The study of developing embryos.
Development A series of events that give rise to a full grown organism.
Embryo A multicellular organism in the early stages of development.
Differentiation A series of changes that transforms unspecialized embryonic cells into specialized cells, tissues, and organs.
Cleavage Series of cell divisions by the zygote
Morula The first stage of development. Solid ball of cells undergoing cleavage.
Blastula Second Stage of development.
Gastrula The third stage of development. In this stage, cells on one side of the blastula move inward and form a multi-layered embryo with three germ layers.
Germ Layers Three distinct tissue layers that form during gastrulation. The three major germ layers are the endoderm, mesoderm and exoderm.
Created by: Mr_Bird
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