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Respiratory System

Respiratory System. By: Wang Qiao-zhi. Objectives ： Recognize the general structure of trachea. 2. Observe the changes features that occur in the walls of conducting portions of lung. 3. Distinguish the various segments of the respiratory system.

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Respiratory System

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  1. Respiratory System By: Wang Qiao-zhi

  2. Objectives： • Recognize the general structure of trachea. • 2. Observe the changes features that occur in the walls of conducting portions of lung. • 3. Distinguish the various segments of the respiratory system. • 4. Realize typeⅡ alveolar celland macrophage in alveolar.

  3. slides: 1.气管（trachea） 2.肺（Lung）

  4. 1、气管（trachea） • 1) Naked eye:In the specimen the large “C” shaped blue band is the hyaline cartilage.

  5. 1. Trachea, H&E Lower magnification(×4)

  6. Epithelium Mucosa lamina propria Submucosa seromucous glands+LCT adventitia Hyaline Cartilage+LCT 1. Trachea, H&E

  7. perichondrium

  8. Folds

  9. 2. Lung, H&E

  10. How to distinguish the BV and intrapulmonary bronchi? BV: endothelium, simple squamous epi,blood Bronchi:Pseudo-stratifiedCiliated Columnar Epi/ ciliated simple columnar /simple columnar epi

  11. Small bronchi cartilage

  12. Small bronchioles SM Cartilage plate Higher magnification(×40)

  13. Bronchioles： ciliated simple columnar A few glands, goblet cells.. Bundle of smooth muscle Distinguish from small bronchi , no pieces of hyaline cartilage.

  14. circular mucosa plica • simple columnar epi: IT is difficulty to distinguish from Bronchioles • goblet cell, gland, cartilage disappear • A whole layer of SM

  15. Respiratory portion : respiratory bronchioles alveolar ducts alveolar sacs alveoli

  16. Arrow – Respiratory bronchiole Arrowhead – Branch of Pulmonary artery

  17. Arrow head – Interrupted smooth muscle layer

  18. knob-liked structure alveoli alveolar duct alveolar sac

  19. alveolar duct terminal bronchiole respiratory bronchiole

  20. Higher magnification(×40) type I alveolar cell macrophage type II alveolar cell

  21. Find structurs as follow: Lower magnification :small bronchioles(if present), bronchiole, respiratory bronchiole, alveolus Higher magnification :and the two cells (type Ⅱ and dust cell)

  22. QUIZ Small bronchi

  23. respiratory bronchiole

  24. terminal bronchiole

  25. respiratory bronchiole alveolar duct terminal bronchiole bronchiole

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