The air that enters the nasal cavity flows down the trachea. The trachea has a number of adaptations: cartilage rings in the walls of the trachea help to keep it open ciliated epithelium and ...
Every living thing needs oxygen to survive, and the point of breathing ... makes air flow in through the nose and mouth, come down the windpipe and into the lungs. When humans breathe out, their ...
The tubes that carry air from your windpipe to your lungs are called bronchi. When they become inflamed, your lungs produce extra mucus, which can cause breathing trouble or coughing as your body ...
air is so thin and the amount of oxygen so small that pressure oxygen masks no longer do the job. Above the 63,000-foot threshold, humans must wear spacesuits that supply oxygen for breathing and ...