650 



Tributaries. The vertebral vein communicates with the transverse sinus by 

 a vein which passes through the condyloid canal, when that canal exists. It 



FIG. 561. Diagram showing common arrangement of thyroid veins. (Kocher.) 



SUPERIOR 



THYROID 



ARTERY 



FIG 562. The fascia and middle thyroid veins. The veins here designated the inferior thyroid are called by 

 Kocher the thyroidea ima. (Poirier and Charpy.) 



receives branches from the occipital vein and from the prevertebral muscles, from 

 the internal and external vertebral venous plexuses, from the anterior vertebral 



