The nasal cavity is responsible for filtering, warming, and humidifying the air before it enters the lungs.

The primary function of the respiratory system is to exchange gases, specifically oxygen and carbon dioxide, between the body and the environment.

Surfactant reduces surface tension in the alveoli, preventing their collapse and aiding in gas exchange.

Exhalation is the process of breathing out, where carbon dioxide is expelled from the lungs.

The diaphragm is the primary muscle responsible for inhalation; it contracts and moves downward, increasing the thoracic cavity volume.

Asthma is a condition characterized by inflammation of the airways, causing difficulty in breathing.

Hemoglobin in red blood cells primarily transports oxygen from the lungs to the tissues.

The medulla oblongata is the part of the brain that regulates the respiratory rate by responding to carbon dioxide levels in the blood.

The alveoli are tiny air sacs in the lungs where the exchange of oxygen and carbon dioxide occurs.