A breathing regulator was a device that could replace a being's lungs. When Darth Vader's lungs were severely scarred and burnt from Mustafar's Ko-shol gas, one was used in place of lungs.
A breathing regulator was a device that could replace a being's lungs. When Darth Vader's lungs were severely scarred and burnt from Mustafar's Ko-shol gas, one was used in place of lungs.