18 Questions
What is the surface of the placenta that faces the fetus like?
Smooth, shiny, and glistening
How many cotyledons does the maternal surface of the placenta typically divide into?
15-25
What type of cells covers the surface of the septa in the placenta?
Syncytial cells
What is the term for the abnormal shape of the placenta where it consists of two equal lobes connected by placental tissue?
Placenta Bilobated
What is the function of the placenta that involves producing enzymes?
Production of enzymes
What is the term for the placenta's ability to act as a barrier?
Barrier function
What is placenta circumvallate characterized by?
A whitish ring composed of decidua seen around the placenta from its foetal surface.
What is placenta fenestrate?
The placenta has an abnormal opening.
What is placenta membranous?
The placenta consists of membranous placental tissue.
What is the characteristic of placenta previa?
The placenta is partly or totally attached to the lower uterine segment.
What is velamentous placenta?
When the umbilical blood vessels are attached to amnion and ramify there before reaching the placenta.
What is placenta accreta?
When chorionic villi penetrate deeply into the uterine wall to reach the myometrium.
What is the function of cytotrophoblast proliferation through Syncytiotrophoblast?
To reach the maternal endometrium
What is the placental barrier composed of early in pregnancy?
Syncytiotrophoblast, Cytotrophoblasts, Primary mesoderm, and Endothelial lining of fetal blood vessels
What is the purpose of the placental barrier?
To prevent mixing between maternal and fetal blood
What is the function of the decidua during the fourth and fifth months of pregnancy?
To form decidual septa that project into intervillous spaces
What is the role of the cytotrophoblast shell?
To form a complete sheet of cytotrophoblastic cells between decidua basalis and intervillous spaces
What is the function of chorionic villi?
To extend from the chorionic plate to decidua basalis and float in maternal blood in intervillous space
Test your knowledge on the anatomy of placental septa and surfaces. Learn about maternal tissue, syncytial cells, cotyledons, and the features of the foetal surface.
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