The chorion is the outermost fetal membrane around the embryo in mammals, birds and reptiles (amniotes). It is also present around the embryo of other animals, like insects and molluscs. In humans and other therian mammals, the chorion is one of the fetal membranes that exist during pregnancy between the developing fetus and mother.

2018年2月26日 · The chorion, on the other hand, is the outer membrane that surrounds the amnion, the embryo, and other membranes and entities in the womb. It is considered as the support platform of the fetus and the amnion.

2019年10月4日 · The chorion is one of the membranes that surround the fetus while it is still being formed. In mammals, the fetus lies in the amniotic sac, which is formed by the chorion and the amnion and separates the embryo from the mother’s endometrium.

2023年10月30日 · The chorion is the outermost of the four membranes surrounding the developing fetus, consisting of trophoblast and underlaying extraembryonic mesoderm. It is continuous with the the lining of the uterine wall (endometrium) superficially and is in contact with the amnion deep to it.

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.

2023年4月28日 · 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.

Amnion and chorion are both fetal membranes that play crucial roles in the development and protection of the fetus during pregnancy. The amnion is the innermost membrane that surrounds the developing embryo and later the fetus.

The meaning of CHORION is the highly vascular outer embryonic membrane of reptiles, birds, and mammals that in placental mammals is associated with the allantois in the formation of the placenta.

The chorion or eggshell of B. mori (Figure 17) is an elaborate structure consisting of more than 100 polypeptides that are produced and secreted by the follicular cells during their terminal differentiation (Nadel et al., 1980; Iatrou et al., 1982).

The chorion is a layer of tissue in the umbilical cord that contains large fetal blood vessels and is primarily composed of dense collagen. It plays a role in transporting nutrients and oxygen between the fetus and the placenta. AI generated definition based on: Diagnostic Gynecologic and Obstetric Pathology (Third Edition), 2018