You are presented with the quiz "Mollusks have a circulatory system with one or two hearts that move blood into what?" 

But you don't know the answer, so you turn to your teacher to ask for hints. He says that "mollusks have a circulatory system with one or two hearts that pump blood" and "blood is pumped by the heart into blood vessels called arteries". 

So, what's the best answer to the question?


 

        arteries   