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Respiratory System

Discover the intricate process of air entering the respiratory system through the mouth or nose, passing through the pharynx, epiglottis, trachea, bronchi, bronchiole, and finally reaching the alveoli. Learn how the system keeps itself clean with nose hair, cilia, and mucus. Explore the gas exchange that occurs in the alveoli, facilitated by thin walls and a capillary mesh, allowing for efficient diffusion of oxygen and CO2. Understand how red blood cells with hemoglobin aid in oxygen transport, and how the medulla oblongata controls breathing via the diaphragm.

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Respiratory System

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  1. Respiratory System

  2. Air Traffic Control • Air enters mouth or nose • Pharynx • Epiglottis • Trachea • Bronchi • Bronchiole • Alveoli

  3. Keeping It Clean Nose hair Cilia Mucus * Cilia can be killed by smoking*

  4. Gas Exchange • Alveoli have thin walls • Capillary mesh around each alveolus • Diffusion of oxygen and CO2 to and from blood stream

  5. Transport • RBC – red blood cells • RBCs contain hemoglobin which contains iron • Iron attracts and holds oxygen

  6. Control • Controlled by medulla oblongata • Diaphragm pulls down, lungs expand ***No vacuum, no breathing***

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