Chapter 42.3, Problem 2CYP

Summary Introduction

To determine:

The names of embryonic membranes that give rise to umbilical blood vessels, the fetal half of placenta and the first blood cells.

Introduction:

A zygote develops into an embryo which is a triple layered structure. The three layers of an embryo are the ectoderm, the mesoderm and the endoderm. As the name suggests ectoderm is the outermost layer, mesoderm being the middle layer and the endoderm is the innermost layer of an embryo. These three layers form all the parts and organs of a human body.