CHAPTER III 



ELEMENTARY ANATOMY OF A HOUND {continued) 



The Internal Organs 



(a) Respiratory Apparatus. — Full development of 

 the respiratory apparatus is a sine qua non in all 

 hounds required to work, which demands also a 

 sound heart. 



The respiratory apparatus begins at the nostrils 

 and ends with the lungs, the last named being for 

 the purpose of purifying the blood after it has 

 circulated through the body. 



There is a right and left nostril divided by a car- 

 tilaginous partition — septum nasi ; and it is through 

 these and the mouth that air passes into the lungs, 

 via the larynx and trachea (windpipe), and its division 

 and subdivision into the bronchial tubes. 



The lungs are divided into right and left, with the 

 heart lying between them. They occupy nearly 

 the whole of the chest or thoracic cavity, and are 

 separated from the contents of the belly cavity by 

 a muscular partition known as the diaphragm or 

 midriff, which is one of the principal muscles con- 

 nected with the respiratory movements. 



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