ANSC 333 COMPLETE STUDY GUIDE 2026
CORE ANIMAL SCIENCE CONCEPTS AND
VERIFIED SOLUTIONS
◉ -ruminants
-binucleated- removes one layer between mom and baby
-both 5 and 6 layers
-only a small portion of cells have the ability to binucleate-small
percentage of placenta
Answer: synepitheliochorial
◉ -dogs and cats
-5 layers
Answer: endotheliochorial
◉ -primates and rodents
-only 3 layers-all layers are fetal
-super efficient
Answer: hemochorial
, ◉ when the placental expulsion occurs, there is no more stopper for
uterine blood flow- causes a major risk of bleeding out, biggest
cause of maternal death during pregnancy
Answer: What is the risk with hemochorial placental types?
◉ horse and pigs
ephitheliochorial
no invasion of embryo
Answer: Diffuse placenta
◉ dogs and cats
endothelialchorial
regions of expensive innerdigitation for effective transport
Answer: Zonary Placenta
◉ primates and rodents
hemochorial
Answer: Discoid placenta
◉ ruminants
50-120 convex placentomes
Answer: cotyledonary placenta
CORE ANIMAL SCIENCE CONCEPTS AND
VERIFIED SOLUTIONS
◉ -ruminants
-binucleated- removes one layer between mom and baby
-both 5 and 6 layers
-only a small portion of cells have the ability to binucleate-small
percentage of placenta
Answer: synepitheliochorial
◉ -dogs and cats
-5 layers
Answer: endotheliochorial
◉ -primates and rodents
-only 3 layers-all layers are fetal
-super efficient
Answer: hemochorial
, ◉ when the placental expulsion occurs, there is no more stopper for
uterine blood flow- causes a major risk of bleeding out, biggest
cause of maternal death during pregnancy
Answer: What is the risk with hemochorial placental types?
◉ horse and pigs
ephitheliochorial
no invasion of embryo
Answer: Diffuse placenta
◉ dogs and cats
endothelialchorial
regions of expensive innerdigitation for effective transport
Answer: Zonary Placenta
◉ primates and rodents
hemochorial
Answer: Discoid placenta
◉ ruminants
50-120 convex placentomes
Answer: cotyledonary placenta
