OBJECTIVES 1. Bilaminar and trilaminar germ discs 2. Describe the formation and derivatives of ectoderm mesoderm and endoderm 3. The components of fetal membrane and their functions 4. Structure and function of placenta 5.comPositionofPlacentabarrierOBJECTIVES 1.Bilaminar and trilaminar germ discs. 2.Describe the formation and derivatives of ectoderm, mesoderm and endoderm. 3.The components of fetal membrane and their functions. 4.Structure and function of placenta. 5.Composition of Placenta barrier