| 1 | The majority of boys was in mesomorph and ectomorph. | |
| 2 | Derived from two embryonic germ layers, the ectoderm and the endoderm. | |
| 3 | The way we did this was to coax embryonic stem cells first to develop into the surface layer. | |
| 4 | The results showed:At gastrula stage, the cells in front of the embryonic area gradually cleave to form optic disc rudiment. | |
| 5 | This is homogeneous with himself and in continuity with his ectoderm and his endoderm. |