Examlex
The system responsible for the exchange of gases between the blood and atmospheric air is the _____________ system.
Placenta
An organ that develops in the uterus during pregnancy, providing oxygen and nutrients to the fetus while removing waste products.
Chorion
Outermost extraembryonic membrane of amniotes; major component of the placenta in placental mammals.
Epidermis
Outermost tissue layer. In animals, the epithelial layer of skin. In plants, the dermal tissue.
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