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The outer layer of blastula is always known as ectoderm.
The outer layer-the ectoderm The middle layer-the mesoderm The inner layer-the endoderm
Neuronal ectoderm
Hydra is in the phylum of the cnidarians which is a radical symmetry. so ectoderm, the outer layr which form the nerve sytem. Also, the endoderm, the inner layer are presented in the hydra.
ectoderm.
Ectoderm
Ectoderm, endoderm, and mesoderm can produce epithelial tissues
by the ectoderm layer
Skin develops from ectoderm.
There are only two layers.Endoderm layer and ectoderm layer.
ectoderm
its the ectoderm