How many chambers does a dog's heart have?

4

Who portrayed the first cinematic Spider-Man appearing in "Captain America: Civil War"? Who wrote the novel '1984'? Which Weasley twin dies during the Battle of Hogwarts? How many players are on each side in water polo during active play? What traditional dish, called poutine, originated from Canada and consists of french fries, cheese curds, and which topping?