BIOLOGY - Physiology - Respiratory System

The video explains the human respiratory system, detailing how it extracts oxygen and expels carbon dioxide. It follows the journey of an oxygen molecule from inhalation through the trachea, bronchi, and alveoli, where gas exchange occurs. The video also discusses the body's defense mechanisms, such as cilia and mucus, to protect the lungs. It highlights potential respiratory issues like asthma and pneumonia and describes medical procedures like bronchoscopy for diagnosing lung problems.

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