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The chorion is the outermost layer of the amniotic sac around the embryo in mammals, birds and reptiles. It forms the placenta, the chorionic villi, and the chorioallantoic membrane in different stages of development.
Learn how amnion and chorion are two extra embryonic membranes that protect and nourish the fetus during pregnancy. Find out their structures, roles, and differences in this article.
chorion, in reptiles, birds, and mammals, the outermost membrane around the embryo. It develops from an outer fold on the surface of the yolk sac. In insects the chorion is the outer shell of the insect egg. In vertebrates, the chorion is covered with ectoderm lined with mesoderm (both are germ layers) and is separated from other embryonic membranes by an extraembryonic body cavity, the coelom ...
The chorion is a membrane that surrounds the fetus in mammals and some non-mammals. It protects the embryo, nurtures it and forms the placenta with the mother's tissues. Learn more about its structure, function and development stages.
The chorion is the outermost membrane around the fetus, consisting of trophoblast and extraembryonic mesoderm. It forms the amniotic sac with the amnion and the placenta with the chorionic villi.
Chorion Definition The chorion is a membrane that develops around the developing fertilized egg. It begins to develop during the early stages of pregnancy, particularly after the young embryo implants in the uterine lining (endometrium) and form the germ layers. The chorion's main job is to protect and nourish the developing baby inside the mother's womb. It also helps to create a barrier ...
Chorion is a membrane that surrounds the embryo in developing eggs. It provides protection and nourishment to the developing embryo.
Chorion is the outermost membrane of the embryo or fetus, composed of extraembryonic tissues and forming part of the placenta. Learn more about chorion in different contexts, such as human, reptile, bird, and insect development, from various medical and biological sources.
Learn about the chorion, a layer of tissue in human and animal embryos that forms the placenta and protects the fetus. Find chapters and articles on chorion structure, function, development, and nanotoxicity from various scientific sources.
The main difference between chorion and placenta is that chorion is the outermost fetal membrane, covering the embryo of mammals, reptiles, and birds whereas placenta is the temporary organ that connects the developing fetus to the uterine wall through umbilical cord in mammals.