The Placenta Flashcards
Describe decidual cells
Enlarged
Contain lots of glycogen & lipid
What is the desidual reaction?
A change in cells of endometrium
In response to blastocyst implantation
Functions if decidua
Nourishment
Limits invasiveness if trophoblasts
Forms maternal component of placenta
Forms cleavage plane
Syncytiotrophoblast function
Produce anticoagulants to prevent blood clots
What’s the maternal part if the placenta?
Decidua basalis
Where should the placenta be located?
High up, posterior
What happens if placenta is low?
Normally must give birth to placenta 2nd.
Placenta previa= low
If you force it out first, bad, as it keeps baby alive
What do you do if placenta is low?
C section
Name the layers of the placental barrier
1) Syncytiotrophoblasts
2)
3)
4)
5)
How often if blood replaced in a minute in the placenta?
3-4 times
High perfusion rate
Origin of placenta?
Dual origin from fetal & maternal tissue
Immunological paradox
Tasks of placenta
Gas exchange
Transport of nutrients
Excretion
Hormone & protein synthesis
Cotyledons
Area of exchange (under decidua basalis) 20-25 present
Vessels of umbilical cord
2 arteries
1 vein
Placenta abruption
Comes away too early
