1. Respiratory System

2. CATS Respiratory system on cat: Diaphragm Visceral pleura Trachea
Pharynx (Back of throat)
Larynx
Bronchus

3. Larynx (Esophagus behind)
Trachea
Lungs (visceral pleura is shiny surface)
Diaphragm

4. Trachea Primary Bronchi Secondary bronchi

5. MODELS Upper Respiratory model: External nares Nasopharynx
Lingual frenulum (attachment under tongue)
Oropharynx
Uvula
Palatine tonsil (part of the immune system)
Laryngopharynx
Thyroid gland

6. Nasopharynx
Uvula
Oropharynx
Laryngopharynx

9. Trachea model: Trachealis muscle Arytenoid cartilage Cricoid cartilage
Hyoid bone
Thyroid cartilage
Glottis (hole opening to the trachea)
Epiglottis (“leaf-like” flap that covers glottis)

10. Hyoid bone
Epiglottis
Thyroid cartilage
Glottis
Arytenoid cartilage
Cricoid cartilage
Trachealis muscle
Thyroid gland

11. Hyoid bone
Epiglottis
Thyroid cartilage
Trachealis muscle
Thyroid gland
Cricoid cartilage

12. Hyoid bone
Epiglottis
Thyroid cartilage
Glottis
Vocal cord
Arytenoid cartilage
Cricoid cartilage

13. Larynx
The ability to vary the pitch of the voice results from the tension in the vocal cords.
The epiglottis is a leaf-shaped flap that closes over the glottis during swallowing to keep food from entering the trachea.

14. Lung The right lung is larger than the left one.
More cigarette smoke gets in this side
Cancer is more common in the right lung
Most foreign substances in the air do not reach the lungs because the ciliated epithelium and mucus that line the respiratory passages trap them and we cough it up.

15. Thyroid cartilage
Cricoid cartilage
Thyroid gland
Trachea
Lung
Visceral pleura (shiny top layer)

16. Trachea
Primary Bronchi
Secondary Bronchi
Hilus (root)

18. SAC Models
Hilus of lung

19. SAC Models Trachea Primary bronchus Secondary bronchus
Tertiary bronchus

20. Bronchiole
Alveoli

21. Diaphragm When the diaphragm contracts: the thoracic cavity increases
the pressure inside the thoracic cavity drops
The air flows into the lungs

22. SLIDE: LUNG Trachea Bronchi (larger, has cartilage) Bronchiole
Made of hyaline cartilage
Lined with pseudostratified columnar epithelium
Bronchi (larger, has cartilage)
Bronchiole
Alveolus (Functional unit of the lung)

23. Lung
Bronchi
Bronchiole
Alveoli

24. Lung

25. Lung
Alveoli
Bronchiole
Artery

26. Lung
Esophagus
Trachea