Ectoderm
Ectoderm is one of three principal germinal layers of cells that are formed in early in embryonic development. Ectoderm comprises the outermost germinal layer from which the nervous system, e...
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Endoderm
Endoderm is one of three principal germinal layers of cells that are formed in early in embryonic development. Endoderm is also referred to as entoderm.
The other principal germinal layers (e...
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Mesoderm
Mesoderm is one of three principal germinal layers of cells that are formed in early in embryonic development. Mesoderm comprises the middle germinal layer that lies between the ectodermal an...
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Ectoderm
Cell division of a fertilized egg results in the formation of a population of presumably equivalent cells. The initially large egg is cleaved into smaller embryonic cells. Cleavage is followe...
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Endoderm
Endoderm (also called entoderm) is one of the three original layers of tissue which appear during early formation of the embryo (the embryo is the offspring, developing within an egg, seed, o...
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Mesoderm
Mesoderm is one of the three primary germ layers of a vertebrate embryo. A zygote is formed after fertilization which develops by cell division into a blastula. This is followed by gastrulati...
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Ectoderm
Ectoderm