Topics:
Animal Refresher, Animal Reproduction
Type of Placenta in Bitch & Cat
View Complete Answer & Explanation
Question (English)
Type of placenta present in bitch & cat is:
- Haemochorial
- Syndesmochorial
- Endotheliochorial ✓ Correct
- Epitheliochorial
Explanation:
Correct Answer: Endotheliochorial
The bitch (dog) and cat have a Zonary, Endotheliochorial type of placenta. In this type, the chorion is in direct contact with the endothelium of the maternal blood vessels.
Classification of Placenta by Histological Depth (Barriers)
- Epitheliochorial (6 layers): Horse, pig, camel — chorion contacts maternal epithelium; least invasive.
- Syndesmochorial (5 layers): Sheep & goat — maternal epithelium partially eroded.
- Endotheliochorial (4 layers): Bitch, cat — maternal epithelium and connective tissue eroded; chorion contacts maternal endothelium. ✔
- Haemochorial (3 layers): Human, monkey, rodents — most invasive; chorion bathes directly in maternal blood.
Classification by Shape
- Diffuse: Horse, pig, camel
- Cotyledonary: Ruminants
- Zonary: Bitch, cat ✔
- Discoid: Human, monkey, rodents
Memory Tip
"Zonary & Endotheliochorial = Zany (dog & cat are carnivores that are zone-shaped and eat endothelia)"
📚 About this Topic — Animal Refresher
This multiple choice question is from Animal Refresher, Animal Reproduction. It has 4 options with a detailed explanation of the correct answer. Practice more MCQs from Animal Refresher to strengthen your preparation.
