PHLEBOTOMY. 



497 



Phlebotomy at the Jugular. 



This vein is usually selected on accoimt of its size, its situation, 

 and the facility with which it can be opened, and the wound of 

 the skin closed. It is, however, contra-indicated when the vessel 

 is in any degree diseased, or when the animal is suffering with 

 itching skin diseases. 



Formed by the superficial temporal trunk and the internal 

 maxillary vein, the jugular descends through the parotid gland to- 

 ward its inferior extremity, receiving several collateral veins, and 

 reaches the groove of the lower part of the neck, which from its 

 presence is called the jugular groove^ until it reaches the lower 

 extremity of the neck, when it enters the chest.' In its course in 

 the groove it accompanies more or less closely the carotid artery, 



Fig. 443.— Anatomy of the Jugular Vein and (Esophagus in the Horse. J J, Jugular 

 vein; C, carotid artery; O 11, omo-hyoideus muscle; D, oesophagus; S, sterno-maxillariB 

 muscle; M, mastoido-humeralis muscle. 



