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Placenta - Anatomy & Physiology (view source)
Revision as of 19:56, 11 July 2011
, 19:56, 11 July 2011→Types of Placenta
==Types of Placenta==
==Types of Placenta==
===Macroscopic Physiology===
The physical contact surfaces used within the process of circulatory exchange are the fetal membranes and the endometrium and this exchange takes place via microscopic chorionic villi that invade the endometrium. These chorionic villi are covered by epithelium the extent and number of these contact areas forms the basis for the classification of different types of placenta.
The physical contact surfaces used within the process of circulatory exchange are the fetal membranes and the endometrium and this exchange takes place via microscopic chorionic villi that invade the endometrium. These chorionic villi are covered by epithelium the extent and number of these contact areas forms the basis for the classification of different types of placenta.
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===Microscopic Physiology===
As well as physiologic differences in the macroscopic appearance of the placenta between species, the microscopic structure of the interaction between fetal and maternal tissues also differs between species.
== Exchange ==
== Exchange ==