794 DIRECTIONS FOB LABORATORY WORK 



Note the pseudo-stratified ciliated columnar epithelium, goblet cells, the 

 extensive vascular corium, and the sero-mucous glands. Sketch h.p. a 

 narrow segment (213). 



(3) Make h.p. sketch (214) of olfactory mucous membrane, noting: 

 a, sustentacular cells; b, olfactory cells; c, basal cells; and d, serous 

 glands of Bowman. In what respect is the olfactory cell unique ? 



(4) In a section of the cat's nose, note the vomero-nasal organ of 

 Jacobson in the median septum, one on either side of the cartilaginous 

 plate. Sketch a narrow segment. 



(B) THE LARYNX. 



(1) Study a stained vertical section through lateral wall of the 

 larynx. Note vocal cords (true and false) and ventricle. Sketch (215), 

 indicating the types of epithelium and the contents of the corium at 

 different levels. What are the fundamental tissues comprised in the 

 true vocal cords? 



(C) THE TRACHEA. 



(1) Study a stained transverse section of the trachea. Note: a, 

 character of the lining epithelium; b, goblet cells; c, elastic layer in 

 tunica propria; d, muscularis mucosse? e, tela submucosa, with its 

 mucous glands with demilunes; f, fibre-cartilaginous tunic. Trace the 

 duct of a mucus-secreting gland to the surface. Note its apulla in the 

 corium. What is the character of the cartilage of the adventitia? Ex- 

 plain the trachealis muscle. Sketch h.p. (216) a narrow segment of 

 the complete width of the wall. 



(D) THE BRONCHI. 



(1) Study a stained transverse section of a primary bronchus. Com- 

 pare with trachea. In what points do they differ ? 



(E) THE LUNG (Pulmo). 



(1) Make h.p. sketch (217) of narrow segment of wall of sec- 

 ondary or tertiary bronchus. Note : a, muscularis mucosse ; b, lymphoid 

 tissue (solitary nodules?); c, mucous glands; d, character of lining 

 epithelium. How are the pulmonary artery and vein, and the bronchial 

 artery and vein, related to these bronchi? 



(2) Sketch h.p. (218) a bronchiole. What are the chief structural 

 differences between a bronchiole and a tertiary bronchus? Relation of 

 pulmonary artery and vein to bronchiole? Structure of terminal (res- 

 piratory) bronchiole ? 



