Changes

==Introduction==

==Introduction==

Gastrulation is the process of forming the three germ layers; ectoderm; mesoderm; and endoderm. It is achieved through a series of highly coordinated series of cell movements. Cells that will form the endodermal and mesodermal organs are brought inside the embryo, whilst cells that will form ectoderm move to spread out over the outside of the embryo.

Gastrulation is the process of forming the three germ layers; '''ectoderm''', '''mesoderm''' and '''endoderm'''. It is achieved through a series of highly coordinated series of cell movements. Cells that will form the endodermal and mesodermal organs are brought inside the embryo, whilst cells that will form ectoderm move to spread out over the outside of the embryo.

*Ectoderm - outside layer

'''Ectoderm''' - outside layer

*Mesoderm - middle layer

'''Mesoderm''' - middle layer

*Endoderm - inner layer

'''Endoderm''' - inner layer