THE EXTERNAL EAR 



ex.", 



THE EXTERNAL ACOUSTIC MEATUS 



The external ACOUSTIC MEATUS (or auditory canal) is divisible into 

 an outer cartilaginous and an inner bony portion; the walls of the two 



be a c b 



FIG. 571. TRANSECTION OF THE LOBULE OF THE EXTERNAL EAR OF AN INFANT. 



a, cartilage; b, skin; c, adipose connective tissue. Hematein and eosin. Photo. 

 X 20. 



portions, except for this difference, are quite similar in structure. The 

 cartilage is continuous with that of the auricle, and is of the cellular 

 elastic variety. The skin of this portion contains large stiff hairs and 

 both sebaceous and ceruminous glands. The former, as in the auricle, 



