Multiple choice

The primitive type of placenta in mammals is referred to as

  1. epitheliochorial placenta

  2. syndesmochorial placenta

  3. endotheliochorial placenta

  4. haemoendothelial placenta

  5. -
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A Correct answer
Explanation

Hippopotamuses and pigs have an epitheliochorial placenta. Here a layer of fetal tissue is merely pressed close against the uterus wall.

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