gastrulation

It has been an old dream of mine to substitute for the presumptive mouth region of a newt the foreign ectoderm which comes from a frog early in gastrulation, since I wanted to find out what kind of

Hans Spemann - Nobel Lecture 1965

Yet in vertebrates, as the notochord is forming during a developmental process called gastrulation, it first functions to establish the midline of the embryo.

Haeckel had a point - The Panda's Thumb 2010

The next stage, gastrulation, is the subject of a famous bon mot by Lewis Wolpert: ‘It is not birth, marriage, or death, but gastrulation, which is truly the most important time in your life.’

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

The next stage, gastrulation, is the subject of a famous bon mot by Lewis Wolpert: ‘It is not birth, marriage, or death, but gastrulation, which is truly the most important time in your life.’

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

Whether the embryo is a ball of cells or a mass on top of a yolk, though, all vertebrates carry out equivalent movements during gastrulation; again, the differences are superficial, depending on whether the cluster of cells is balled up or flattened.

A bit more on Haeckel - The Panda's Thumb 2010

The processes of cell signaling important in inducing new tissues during gastrulation are similar in all vertebrates, and the same answers are turning up in fish and mice, despite the morphological differences in their layouts.

A bit more on Haeckel - The Panda's Thumb 2010

These differences in shape lead to some apparent differences in the next step of development, gastrulation.

A bit more on Haeckel - The Panda's Thumb 2010

The critical function of gastrulation is that some cells have to move inward, into the mass of cells.

A bit more on Haeckel - The Panda's Thumb 2010

In neurulation, as in gastrulation, invagination is much in evidence.

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009

Below is one of the things that sheets of cells are observed to do during the course of embryonic development, for example during gastrulation.

THE GREATEST SHOW ON EARTH RICHARD DAWKINS 2009