What does Deciduas mean?
What does Deciduas mean?
Definition of decidua 1 : the part of the endometrium that in higher placental mammals undergoes special modifications in preparation for and during pregnancy and is cast off at parturition. 2 : the part of the endometrium cast off in the process of menstruation.
What are the three layers of the decidua?
The decidua, like secretory endometrium, consists of three layers:
- the superficial compact layer,
- the intermediate spongy layer,
- the thin basal layer.
What is the decidua basalis made up of?
placenta
human pregnancy …of cells known as the decidua basalis, the maternal component of the mature placenta; it is cast off when the placenta is expelled. The fetal part of the placenta—the villi and their contained blood vessels—is separated from the decidua basalis by a lakelike body of fluid blood.
Where is the decidua basalis found?
As the amniotic cavity expands to fill the uterus, the decidua capsularis becomes thinner until the chorioamnion is in direct contact with the decidua parietalis. The decidua basalis is the portion at the base of the placental disk, underneath the chorion frondosum.
What is decidua Parietalis?
[ pə-rī′ĭ-tā′lĭs ] n. The mucous membrane lining the main cavity of the pregnant uterus elsewhere than at the site of attachment of the chorionic vesicle.
Where is the decidua basalis?
What is the decidua Capsularis?
[ kăp′sə-lâr′ĭs ] n. The layer of endometrium overlying the implanted chorionic vesicle that progressively diminishes as the chorionic vesicle enlarges.
What makes up the intervillous space?
Definition. The intervillous space is normally filled with maternal blood and a small amount of fibrin, with the villi evenly spaced; neighboring villi usually do not touch one another. When fibrin entirely encases a villus, the villous syncytiotrophoblast covering gradually degenerates.
