TED-Ed: How do the lungs work? - Emma Bryce

The video explains the vital role of breathing in transporting oxygen to cells and removing carbon dioxide. It details the respiratory system's components, including the lungs and autonomic nervous system, and describes the breathing process, from inhalation to exhalation. The video also covers the gas exchange process in the alveoli, where oxygen is absorbed and carbon dioxide is expelled. Finally, it highlights the efficiency of the respiratory system, which handles 10,000 liters of air daily.

What is the primary role of the autonomic nervous system in breathing?

• To consciously control breathing

• To send signals to the muscles around the lungs

• To regulate body temperature

• To increase the heart rate

How does air travel from the trachea to the lungs?

• Via the bronchi and bronchioles

• Through the esophagus

• Through the diaphragm

• Directly into the alveoli

What happens at the alveoli during the breathing process?

• Blood cells are produced

• Oxygen is converted into carbon dioxide

• Carbon dioxide is absorbed into the bloodstream

• Oxygen is exchanged for carbon dioxide

What triggers the exhalation process in the respiratory system?

• The lungs expanding

• The diaphragm flattening

• The intercostal muscles contracting

• The diaphragm balling up

Approximately how many liters of air do the lungs process each day?

• 5,000 liters

• 20,000 liters

• 1,000 liters

• 10,000 liters