Page 69 - كتاب تمريض نسا الاكتروني

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maternal blood into the intervillous spaces of the placenta.

-There is relatively high pressure as the maternal blood fills intervillous space through

these spiral arteries which bathe the fetal villi in blood, allowing an exchange of gases to

take place.

-The maternal blood comes into direct contact with the fetal chorion, though/ but no

fluid is exchanged (placental barrier).

Function of decidua:

It is the site of implantation

Nutrition of the embryo (contain fat and glycogen)

Protection of uterine wall against invasion by chorionic villi

Formation of placenta

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