1. Respiratory System
Just Breathe!

2. The Nose (canine)
Nasal Plate
2. Nasal Philtrum

3. The canine head showing respiratory apparatus
1. Nostril; 2, 3, 4 Nasal concha; 5, Frontal sinus; 6. Hard palate; 8. Tongue; 8’ Oropharynx (the space); 9. Soft palate; 10’ Nasopharynx (the space); 10 Epiglottis; 12 trachea; 13 Esophagus

4. Paranasal Sinuses
Canine
Porcine

5. Laryngeal Cartilages in the Horse
Epiglottic; 2. thyroid; 3. cricoid; 4 arytenoid; 5 trachea; 6. cricoarytenoid joint; 7. crocothyroid joint
(You do not have to be able to name these all.

6. Complex muscles control laryngeal movement

7. Median section of Equine larynx
1. Epiglottis; 2. corniculate process of arytenoid cat.; 3 Vestibular fold; 4 Vocal fold (cord); 5. Laryngeal ventricle; 6. Lamina of cricoid cart; 7. Cricothyroid ligament

8. Photograph of the same section

9. Transverse section of larynx
2. Glottis; 3. Vocal ligament in vocal fold; 8,9,10 laryngeal cartilaages; 4, 5, 6 laryngeal muscles
Examples: Roaring horses, laryngeal hemiplegia

10. Transverse section of A canine and B bovine tracheas
1. Mucous membrane; 2 tracheal cartilage; 4. Tracheal muscle (external in dogs, internal in cattle.

11. Schematic of the Pleural Cavity
1. Costal pleura; 2. Mediastinal pleura; 3. Diaphragmatic pleura; 4. Visceral Pleura; 5. Diaphragm 6. Pericardium

12. Transverse Section of the canine thorax
Note the heart suspended within the pleura and the pericardium. 1,2 pleura; 4. pericardium; 6 aorta; 7 esophagus; 8 tracheal bifurcation; 10 heart

13. The Canine Thorax (for orientation)

14. Lungs
A, B Pig C, D Dog

15. Pig Lungs
1. Trachea; 2 pulmonary trunk; 3. Pulmonary veins; 4 Bronchus

16. Equine Lungs and Heart

17. Structures to Note
Trachea
Bronchi
Bronchioles
Texture of alveoli