Step 1: In a one to two-page paper, give an overview of the embryonic stage of d

Step 1: In a one to two-page paper, give an overview of the embryonic stage of development.

-Describe the ectoderm, mesoderm, and endoderm and their associated structures.
-Discuss the structure and function of the embryonic disk.
-Describe embryo development and the role of chorionic villi.
-Include any environmental factors that may cause malformations in the developing embryo.