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. decidua vera.
What is the decidua Capsularis?
The decidua capsularis is the portion underlying the chorion laeve and fuses with it to become the outermost component of the peripheral membranes. 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.
What is decidual Basalis?
Medical Definition of decidua basalis : the part of the endometrium in the pregnant human female that participates with the chorion in the formation of the placenta.
What does decidua Capsularis become?
The part of the decidua that interacts with the trophoblast is the decidua basalis (also called decidua placentalis), while the decidua capsularis grows over the embryo on the lumenal side, enclosing it into the endometrium.
What forms the decidua basalis?
Placental Membrane The fetal part of the placenta is known as the chorion. The maternal component of the placenta is known as the decidua basalis. Oxygen and nutrients in the maternal blood in the intervillous spaces diffuse through the walls of the villi and enter the fetal capillaries.
What is the decidua basalis made up of?
Usually, the epithelial layer of the membrane consists of either stratified squamous epithelium (multiple layers of epithelial cells, the top layer being flattened) or simple columnar epithelium (a layer of column-shaped epithelial cells, the cells being significantly greater in height than width).
What are the 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.
Is decidua Capsularis part of placenta?
The placenta is a fetomaternal organ. The fetal portion of the placenta is known as the villous chorion. The maternal portion is known as the decidua basalis….Decidua.
| Region | Description |
|---|---|
| Decidua basalis | Region between the blastocyst and the myometrium |
| Decidua capsularis | Endometrium that covers the implanted blastocyst |
What is the function of decidua basalis?
Of the decidua, the decidua basalis is the most important, as the vessels in this part of the modified endometrium supply maternal arterial blood to the lacunae between the fetal chorionic villi and receive venous blood from the lacunae.
What is the stratum Functionalis?
The stratum functionalis is a thick superficial layer that is sloughed off during menstruation and grows anew during each cycle. It is therefore a temporary tissue with an “unfinished” appearance — not quite as tidily organized as the mucosal tissues in most other organs.