How Our Lungs Work

The video explains the process of breathing, detailing how the respiratory system works. It covers the journey of air from inhalation through the trachea and bronchial tubes to the alveoli, where gas exchange occurs. Oxygen is absorbed into the blood and transported by the heart to the body, while carbon dioxide is expelled. The diaphragm aids in breathing by creating a vacuum for air intake. Cilia and mucus protect the air passages from harmful substances.

What happens to the air as it travels through the bronchial tubes?

Describe the function of cilia and mucus in the respiratory system.