What is a placental cotyledon:
Correct Answer: All branches from one stem villi
Description: Functional unit of the placenta is called a fetal cotyledon or placentome,which is derived from a major primary stem villus. These stem villi pass down through the intervillous space to anchor onto the basal plate.About 60 stem villi persist in human placenta. Thus each cotyledon(totalling 15-29) contains 3-4 major stem villi. Reference : Dutta Textbook of Obstetrics &th edition page no 31
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Gynaecology & Obstetrics
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