608 



THE EAR 



former, as in the auricle, open either upon the free surface of the 

 skin or into the adjacent portion of the hair follicles. 



The ceruminous glands resemble in structure the sweat glands 

 of other portions. They are coiled tubular glands which open 



be a c b 



FIG. 442. TRANSECTION OF THE LOBULE OF THE EXTERNAL EAR OF AN INFANT. 

 a, cartilage ; 6, skin ; c, adipose connective tissue. Hematein and eosin. Photo, x 20. 



upon the surface of the skin by means of a narrow duct. The coils 

 of their secreting portion are lined by columnar cells with sphe- 

 roidal, basally situated nuclei and a clear cytoplasm containing 

 many small brownish granules of pigment and a few fatty particles. 

 The cytoplasm is often diffusely colored by the brownish pigment. 

 The secretion of these glands, the cerumen, in addition to the pig- 



