| At gastrulation, the germ plasm is located in cells in the floor of the blastocoel cavity, among the cells that give rise to the endoderm. |
| After the blastula develops, it undergoes transition to the gastrula, a process called gastrulation. |
| During gastrulation the material of the notochord comes to lie middorsally in the roof of the archenteron. |
| Cell shape change is fundamental to diverse processes including gastrulation, neuronal pathfinding, immune response, metastasis, and cytokinesis. |
| The fate maps of the different vertebrates are thus similar when one looks at the relationship between the germ layers and the site of ingression of cells at gastrulation. |
| Special focus has been on the pattern of early cleavage, blastoderm and germinal disc development and gastrulation. |
