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Placental (ex. placental mammal) is an animal that nourishes it's developing young internally (inutero/in a uterus) where the connection between the mother's bloodstream and the baby's blood stream using a series of membranes called the placenta. These membranes are produced by the developing offspring and attach to the uterine wall to facilitate the transfer of oxygen and nutrients to the developing "infant" and allow the removal of waste products from the "infant" to the mother.

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11y ago

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