Biology of Man 463 



"eye" tooth 



of each jaw) of two incisors ("front" teeth), one canine 

 or cuspid), two premolars (bicuspids), and three molars. The last pair 

 of molars ("wisdom teeth") is frequently not erupted until later in life, 

 or not at all. Hence, the normal dental formula for man is: 



I 



C 



1 



1 



M 



(for each jaw) 



The incisors are flat and sharp for cutting food as they overlap; the 

 pointed canines correspond to the tusks of carnivorous animals and are 



CENTRAL 

 NCISOR 



LATERAL 

 NCISOR 



CUSPID 



FIRST 

 BICUSPID 



SECOND 

 BICUSPID 



FIRST 

 MOLAR 



SECOND 

 MOLAR 



THIRD MOLAR 

 (WISDOM TOOTH) 



THIRD MOLAR 

 (WISDOM TOOTH) 



SECOND 

 MOLAR 



FIRST 

 MOLAR 



SECOND 

 BICUSPID 



FIRST 

 BICUSPID 



CUSPID 



LATERAL 

 NCISOR 



CENTRAL 

 NCISOR 



Fig. 230. — Chart showing the thirty-two permanent human teeth. (Courtesy of 



the American Dental Association.) 



used for tearing foods; the broad-surfaced premolars have two elevations 

 for grinding purposes; the larger molars have four or more elevations 

 for grinding. 



Sweat glands are present in all skin but are most numerous under the 

 arms, on the forehead, on the soles of the feet, and on the palms of the 

 hands. The coiled, tubular glands are located in the dermis and empty 



