What is the breathing organs of mammals?

The breathing organs of mammals are primarily the lungs. Mammals inhale air through the nose or mouth, which then travels down the trachea and into the lungs, where gas exchange occurs in the alveoli. Oxygen from the air is absorbed into the bloodstream, while carbon dioxide is expelled. This process is facilitated by the diaphragm and intercostal muscles, which help expand and contract the chest cavity during breathing.