1. The brain develops from the ectoderm and blood from the mesoderm. 2. The cells in the early primitive ectoderm basically make the embryo, 3. The median ocelli develop from a transverse fold of the ectoderm . 4. Ectodermal dysplasia describes abnormalities of structures derived from the embryonic ectoderm . 5. These cells are also derived from epiblast which is transformed into ectoderm . 6. The formation of the neural tube from the ectoderm is called neurulation. 7. Meanwhile, the overlying ectoderm secretes bone morphogenetic protein ( BMP ). 8. BMP antagonists diffusing from the ectoderm generates a gradient of BMP activity. 9. Abnormal ectoderm patterning will cause abnormal and no neural folding. 10. Nasal placodes originate on the frontonasal prominence from the ectoderm .
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