1. At least two different states representing the epiblast progenitors in the blastocyst and the pluripotent progenitors of the later gastrulating embryo have been recognized.

2. Four types of the of grafts from the organizer area were transplanted into host embryos to see if the epiblast or hypoblast of the organizer area had an ability to induce a secondary embryo.

3. The mature embryo is corn posed of radicle, coleorhiza , plumule, coleoptile, scutellum and epiblast. That is the typical structure of the mature embryo of grass.

4. Most grass embryos have a flap - like structure known as the epiblast.

5. According to NIH team leader Ronald McKay, that means epiblast cells offer scientists a view of an ES cell just as it's poised to produce mature cell types, including neurons, muscle and bone.