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Pulmonary System

Pulmonary System. Anatomical Structures. Nasal passage Oral cavity Pharnyx Larynx Trachea Bronchi Bronchioles Alveoli Capillaries. Functions. Ventilation Mechanics of moving air in and out of the lungs Respiration Exchanges O2 and CO2. Functions. Ventilation

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Pulmonary System

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  1. Pulmonary System

  2. Anatomical Structures • Nasal passage • Oral cavity • Pharnyx • Larynx • Trachea • Bronchi • Bronchioles • Alveoli • Capillaries

  3. Functions • Ventilation • Mechanics of moving air in and out of the lungs • Respiration • Exchanges O2 and CO2

  4. Functions • Ventilation • Exhalation or Expiration • Occurs passively • Control of breathing: medulla • Inspiration muscles: C3-C5 nerve root

  5. Function • Ventilation • Inhalation or Inspiration • Requires active muscle contraction • Diaphragm (key muscle) • External intercostal • Accessory muscles • Abdominals • Sternocleidomastoids • Scalenes • Trapezius

  6. Functions • Following air (Inspiration) • Enters through nasal passage • Passes though pharynx • Larynx • Trachea • Trachea branches to form R and L bronchi • Bronchi branch into bronchioles • Bronchioles terminate into alveoli

  7. Functions • Respiration • Alveoli surrounded by network of thin walled capillaries • Gas exchange occurs across the thin walls of capillaries and alveoli • Gas exchange (O2 and CO2)

  8. Function • Expiration • Air moves back thru pulmonary system to be exhaled

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