Dr. CHIBOGU Flashcards
Fetal membrane and placenta
Fetal membrane and extra embroyonic member are derived from?
Trophoblast (yellowish squamous like cell surrounding the embro)
How many types of fetal membrane do we have?
4
What are they
Yolk sac
Chorion
Allantoi
Ammnotic
Yolk sac
Closest to embryo
Digestive functions
Reproductive functions
Aminotic sac and fluid
Directly covering the fetus
F
Support and cushion and hydration
Allantoic membrane and sac
Excrete waste
Embroyonic kidney
Contributes to the formation of placenta in primates
Chorion
Outer most layer
F
Facilitates Gaseous exchange in most mammals
Forms placenta
What is a placenta
Placenta is a structure formed from the chorion and maternal endometrium
It varies across species
Chorion
Chorion allantoic
Function of the placenta
Enables metabolic exchange between mother and fetus
. Gaseous exchange, nutrients and water removal
Produces hormones progesterone, relaxin pgf2alpha
What produces equine chorionic Gonadothropin
Trophoblast
Is the chorion and allantoic membrane fused in lower odmr higher animals
Higher animals
What causes a large surface area
The chorion allantoic membrane is fused along its surface to increase surface area
And causes the formation of chorionic villi
What is a labyrinth
This is a valley between two projection
