The chorionic plate is a synonym for the fetal side of the placenta. The maternal side of the placenta is termed the basal plate. Some pathologies and processes are localized to the chorionic plate, and evaluation of the chorionic plate is a part of placental grading.
What makes up the chorionic plate?
The chorionic plate (great part of the placenta on the fetal side) consists of the amnion, the extra-embryonic mesenchyma, the cytotrophoblast and the syncytiotrophoblast.
What is the function of chorionic?
The essential function of the chorion is to develop the villi and the placenta that will provide a pathway for exchange from the mother to the fetus, making it a pivotal part of the development.
What is the chorionic cavity?
The extra-embryonic coelomic cavity is also called the chorionic cavity—it is enclosed by the chorionic plate. The chorionic plate is composed of an inner layer of somatopleuric mesoderm and an outer layer of trophoblast cells. It is the fetal. aspect of the placenta that gives rise to chorionic villi.
What is the difference between placenta and chorion?
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.
What does chorionic mean?
1: of, relating to, or being part of the chorion chorionic villi. 2: secreted or produced by chorionic or related tissue (as in the placenta or a choriocarcinoma)
What is chorion and chorionic villi?
Chorionic villi are villi that sprout from the chorion to provide maximal contact area with maternal blood. After circulating through the capillaries of the villi, blood returns to the embryo through the umbilical vein. Thus, villi are part of the border between maternal and fetal blood during pregnancy.
What is chorion and amnion?
The amnion is found on the innermost part of the placenta. It lines the amniotic cavity and holds the amniotic fluid and the developing embryo. The chorion, on the other hand, is the outer membrane that surrounds the amnion, the embryo, and other membranes and entities in the womb.
What is chorionic reaction?
Chorionic bump is a finding that can be uncommonly seen in a first-trimester scan. It may represent a small hematoma bulging into the gestational sac or an anembryonic (failed) second pregnancy that is being resorbed. It is also seen in some patients undergoing infertility treatment.
Where is the chorionic cavity?
the space surrounding the primary yolk sac and amniotic sac, except where the connecting stalk attaches to the cytotrophoblast of the blastocyst.
Where is the chorionic cavity located?
It is located inside the albumen, which is the white of the egg. It encloses the embryo and the rest of the embryonic system.
What is the embryo?
embryo, the early developmental stage of an animal while it is in the egg or within the uterus of the mother. In humans the term is applied to the unborn child until the end of the seventh week following conception; from the eighth week the unborn child is called a fetus.
What is chorion in pregnancy?
The chorion is a double-layered membrane formed by the trophoblast and the extra-embryonic mesoderm, which eventually will give rise to the fetal part of the placenta.
Where do chorionic villi come from?
Chorionic villi sprout from the chorion after their rapid proliferation in order to give a maximum area of contact with the maternal blood. These villi invade and destroy the uterine decidua while at the same time they absorb nutritive materials from it to support the growth of the embryo.
Does chorion or amnion form first?
The amnion is a membranous sac which surrounds and protects the embryo. It is the first of the three cavities (amnion, chorion and yolk sac) in the embryo and is formed on 8 dpc.