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germination
Chorionic villus sampling involves the removal of a small amount of tissue directly from the chorionic villi (minute vascular projections of the fetal chorion that combine with maternal uterine tissue to form the placenta).
Embryonic Connective tissue: mesenchyme
Placenta
There are three layers of embryonic tissue present in the pig. These layers are called the ectoderm, mesoderm and the endoderm.
Embryonic, due to the Embryo Embryonic, due to the Embryo
Mesenchyme
For nine months the placenta feeds and nourishes the fetus while also disposing of toxic waste.
That tissue is called as placenta. Both fetal and maternal blood come very close to each other here and does not mix. Blood of both is separated by very thin membrane with fairly large surface area.
Undifferentiated mesenchymal tissue
mesodermal
Undifferentiated mesenchymal tissue