36 



EPITHELIAL TISSl'KS 



2. Columnar. 



Xeuro-epi- 

 t helium. 



f (a) Eye the rod and cone cells 

 of the retina. 



(b) Ear in the cristse and mac- 

 nine of the labyrinth and in Cor- 

 ti's organ. 



(c) Xose in the olfactory mucous 

 membrane (true neuron). 



(d) Tongue in the taste buds. 



II. 



1. Squamous. 



2. Columnar 

 (Pseuclo- 

 stratified 

 columnar). 



3. Transitional. 



COMPLEX (STEATIFIED) EP1THELIA those whose cells 

 form several superimposed layers. 



Forms the epidermis of the skin, 

 and covers the free surface of 

 those mucous membranes which 

 clothe all orifices in direct con- 

 nection therewith viz., the con- 

 junctiva and cornea; the exter- 

 nal auditory canal; part of the 

 nasal mucous membrane ; mouth, 

 pharynx, and esophagus; epi- 

 glottis and vocal cords; anus, as 

 high as the internal sphincter; 

 vagina and external portion of 

 the urethra. 



Superficial cells, 

 squamous; 

 deeper, polylie- 

 dral; the deep- 

 est, columnar 

 in shape. 



Superficial cells, 

 columnar; 

 deeper cells, 

 polyliedfal or 

 spindle-sliaped. 



(a) Non-ciliated 

 (rare) 



(b) Ciliated. 



Superficial cells 

 only somewhat 

 flattened; next 

 deeper layer, 

 pear-shaped; 

 deepest layers, 

 polyhedral. 



(a) Part of vas deferens. 



(b) Eespiratory tract; nasal mu- 

 cous membrane and passages 

 connected therewith, tear-ducts, 

 auditory tube, etc., larynx, 

 trachea, and bronchi. 



Genital tract; epididymis and vas 

 deferens. 



Found only in the urinary system 

 viz.. pelvis of the kidney, ure- 

 ter, bladder, and first portion of 

 the urethra. 



