The Vet. Book 



is the one that enables the animal to shake irri- 

 tating foreign substances off its skin. 



The hair (or coat) is shed in the spring and 



Ground Surface of Horde's Foot 

 i, heels ; 2, bars ; 3, frog ; 4, wall ; 5, white line. 



autumn, except in that of the mane and tail which 

 is permanent. There are both sweat glands and 

 sebaceous glands in the skin, but the former are 

 practically absent from the limbs. 



The hoof is a modified epidermal structure 



10 



