What part brings back blood to the lungs that is deoxygenated?

Plz 50 points answer only if you know and dont copy from others draw conclusion explain how trade in the east african city-states resulted in a blending of cultures. provide examples

How did the printing press make it difficult for the catholic church to stop the reformation? o a. priests were too busy printing and distributing bibles to oppose protestantism. o b. it created a growing middle class that was no longer interested in religion. o c. critics of the catholic church were able to quickly replace any hey writings the church destroyed. d. there were few printing presses in italy, where leadership of the catholic church was centered.

Who was william johnson? a. a revolutionary war veteran b. was the most prominent free black in mississippi c. a field slave d. inventor of the cotton gin