What is the tubular passage for air?

The tubular passage for air is the airway. It is a series of hollow tubes that branch off from the nose and mouth and lead to the lungs. This includes the nasal cavity, pharynx, larynx, trachea, bronchi, and bronchioles. The airway's primary function is to transport oxygen from the outside environment to the lungs and then to the rest of the body. It also serves to filter, warm, and humidify the air entering the lungs.

• Nasal cavity
• Pharynx
• Larynx
• Trachea
• Bronchi
• Bronchioles

The airway is lined with mucus-producing cells and cilia, which work together to trap and remove dust, bacteria, and other foreign particles in the air. The airway is also equipped with muscles and cartilage, which help it stay open and allow air to flow freely.