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Haemoendothelial placenta occurs in...

Haemoendothelial placenta occurs in

A

Man and Ape

B

Cow and Goat

C

Deer and Camel

D

Rat and Rabbit

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Question**: The question asks about the occurrence of a hemoendothelial placenta. We need to identify which organisms possess this type of placenta. 2. **Defining Hematological Placenta**: A hemoendothelial placenta is characterized by a very thin trophoblast layer, allowing maternal blood to come into direct contact with fetal blood. This means that the separation between maternal and fetal blood is minimal. 3. **Identifying Organisms with Hematological Placenta**: The organisms that exhibit a hemoendothelial placenta are typically rodents and lagomorphs. Specifically, the rat and rabbit are known examples of animals with this type of placenta. 4. **Eliminating Other Options**: - The men and ape have a hemochorial placenta. - Ruminants like cows, goats, deer, and camels have an endothelial-chorial placenta. - Therefore, the correct answer must be the rat and rabbit, as they are the only ones listed that possess a hemoendothelial placenta. 5. **Conclusion**: The hemoendothelial placenta occurs in the rat and rabbit. **Final Answer**: The hemoendothelial placenta occurs in rats and rabbits. ---
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