Placenta spec D

Question 1

Describe the different types of chorionic villi

Answer 1

Zonary - form band called transfer zone.

Discoid - chorionic villi on disc on one side

Question 2

__ + __ = placentome

Answer 2

Maternal caruncle + fetal cotyledon

Question 3

which animal is this?

Answer 3

sheep caruncle

convex

Question 4

which animal

Answer 4

Question 5

what are these?

Answer 5

bottom right = human - discoid

Question 6

Invasiveness of placenta classification and species differences

Answer 6

Epitheliochorial - least invasive = 6 layers
C, E, M, S

Endotheliochorial - 5 layers (missing

Endometrial epithelium) closer blood supply
Bitch, Queen

Hemochorial - most invasive - 3 layers
1. chorionic epithelium
2. Chorionic CT
3. Fetal capillary
-pool of maternal blood against placenta

Primates

Question 7

describe the separation of circulation and why they need to be separate

Answer 7

-usually no issues during gestation but causes issues post-birth.

placental haemorrhage treated as a foreign antigen

Question 8

Answer 8

Question 9

Placental lactogen and PAGs come from ?

Answer 9

binucleated trophoblasts

Question 10

Answer 10

Left: infection, fungal placentitis

Right: congestion

Question 11

Answer 11

Question 12

placental differences

Cow vs Ewe

Answer 12

Question 13

placental differences
Mare vs sow

Answer 13

Question 14

placental differences

Sow vs Cat vs Dog

Answer 14