Placenta and Fetus

Question 1

the outermost membrane of the embryo is the _____

Answer 1

chorion

Question 2

the _____ brings blood supply to the chorion forming the _____ which is the proper placenta

Answer 2

allantois

chorioallantois

Question 3

based on the distribution of chorionic villi, what are the ways to classify a placenta?

Answer 3

diffuse

cotyledonary

zonary

discoid

Question 4

based on the classification of tissue loss, what are the ways to classify a placenta?

Answer 4

nondeciduate: mother doesn’t lose any substantial tissue
deciduate: significant maternal tissue loss
semidecidute: some maternal tisssue is lost

Question 5

what are the placental classifications based on tissue arrangement at maternal-fetal interface?

Answer 5

epitheliochorial: epithelium of the uterus is present
synepithelialchorial: if there is modification taking place
endotheliochorial: erosion into the endothelium of the uterus
hemochorial: erosion through the blood vessels in the uterus

Question 6

horses have what kind of placenta?

Answer 6

diffuse, non decicuate, epitheliochorial

Question 7

ruminants have ____ placentas

the chorionic villi exist on the _____

Answer 7

cotyledonary, synepitheliochorial

cotyledons

Question 8

what is a placentome?

Answer 8

cotyledons + caruncles

Question 9

what kind of placenta does the dog have?

Answer 9

zonary, endotheliochorial

Question 10

which animals have discoid placentas?

Answer 10

primates, humans, rodents