Final answer:
The amnion and chorion are part of the extraembryonic membranes, with the amnion protecting the embryo in a fluid-filled sac and the chorion forming the fetal part of the placenta.
Step-by-step explanation:
The chorion and the amnion are the two components of the extraembryonic membranes. The amnion is a transparent membranous sac filled with amniotic fluid that encloses and protects the developing embryo. Correspondingly, the chorion is another significant protective membrane that surrounds the amnion and other embryonic membranes, and it plays a crucial role in forming the fetal portion of the placenta through its formation of chorionic villi that invade the uterine lining.