QUESTIONS AND ANSWERS 65 



Name the branches of the external carotid artery. 



Glossofacial, maxillomuscular, posterior auricular, superficial 

 temporal and internal maxillary. 



State the anatomic relations of the external carotid artery. 



From its origin to the hyoid bone, it is related inwardly to the 

 guttural pouch and the glossopharyngeal and superior laryngeal 

 nerves; outwardly, to the outer belly of the digastric muscle and 

 the hypoglossal nerve ; throughout the rest of its course, it is com- 

 prised between the guttural pouch, the parotid gland, the great 

 cornu of the hyoid bone, and the inner side of the posterior border 

 of the inferior maxilla. 



Give the course and the termination of the vertebral artery. 



It arises from the axillary at the first intercostal space. It passes 

 beneath the transverse process of the seventh and through the 

 foramina of the upper six cervical vertebra, anastomosing with 

 the retrograde branch of the occipital and giving off muscular and 

 spinal branches at each intervertebral space. 



Give the blood supply of the larynx. 



The laryngeal artery, which arises from the common carotid at a 

 short distance from its termination, just behind the larynx. 



Give the blood supply of the salivary glands. 



Small branches from the external carotid supply the parotid and 

 submaxillary glands. The sublingual is supplied by the sublingual 

 artery. 



Trace the course of the blood from the left ventricle to the left hind foot, 

 naming in regular order all the important vessels through 

 which the blood passes. n] 



The common aorta, posterior aorta, external iliac, femoral, popli- 

 teal, anterior tibial, collateral artery of the cannon, digital, plantar 

 and p^eplantar. A collateral stream from the popliteal passes 

 through the posterior tibial region and gives off an interosseous 

 branch which unites with the collateral artery of the cannon just 

 above the fetlock. 



Describe the origin and distribution of the external iliac artery. 



Originates in common with the internal iliac from the posterior 

 extremity of the posterior aorta and gives off the small testicular, 

 or artery of the cord in the male, or the uterine in the female, and 

 the circumflex iliac; then it is continued as the femoral upon 

 leaving the anterior border of the pubis. 



