Is a voice box the same as a vocal sac?

No, a voice box and a vocal sac are not the same. The voice box, or larynx, is an organ in mammals that produces sound through the vibration of vocal cords. A vocal sac, on the other hand, is an anatomical feature found in some amphibians, like frogs, that helps amplify their calls during mating or territorial displays. While both are related to sound production, they serve different functions and are found in different groups of animals.