Assignment:
In a one to two-page paper, give an overview of the embryonic stage of development.
1. Describe the ectoderm, mesoderm, and endoderm and their associated structures.
2. Discuss the structure and function of the embryonic disk.
3. Describe embryo development and the role of chorionic villi.
4. Include any environmental factors that may cause malformations in the developing embryo.