Breathing apparatus is a term used to describe the equipment used to help people breathe. The two main components of this apparatus are the lungs and the NARES. The lungs are a pair of organs in the chest that take in oxygen and expel carbon dioxide. The NARES, also known as the nostrils, are the openings in the nose that allow air to enter the body. Together, these two components work together to provide the body with the oxygen it needs to survive.