This video provides an detailed explanation regarding one of the extraembryonic membranes, the allantois. It describes the formation, function and fate of allantois in the embryo as well as an adult human. 00:00 Introduction 00:10 Allantois in Third Week of Development 02:25 3D animation of Folding and Allantois beyond the third week 07:14 Functions of Allantois 08:14 Urachus 11:41 Fate of Allantois