Biological Science
Biological Science
5th Edition
ISBN: 9780321743671
Author: Scott Freeman
Publisher: PEARSON
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Chapter 23, Problem 4TYK
Summary Introduction

Introduction:

Gastrulation refers to the stage which occurs early in the embryonic development of many animals and during which the single sheet blastula is arranged into the multi-layered structure which is known as gastrula. Prior to the gastrulation process, the embryo is the continuous sheet of the epithelial cells.

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Embryology | Fertilization, Cleavage, Blastulation; Author: Ninja Nerd;https://www.youtube.com/watch?v=8-KF0rnhKTU;License: Standard YouTube License, CC-BY