SUPERFICIAL VESSELS
The linguofacial vein is short (Figure 11-6, A/77-B/77). In the dog, the left and right lingual vein unite and form the superficially situated hyoid arch; in the cat, this arch is formed by the left and right linguofacial veins.
The facial vein, when followed rostrally, first passes over the mandibular lymph nodes and then along the ventral border of the masseter before crossing the face obliquely. It arises from the fusion of prominent dorsal nasal and angularis oculi veins rostral to the eye. These run the risk of injury when surgical access is made to the nasal cavity and frontal sinuses. The angularis oculi vein, which emerges from the orbit, is also vulnerable during enucleation (removal) of the eye. The facial artery and accompanying vein serve the lips, cheek, and muzzle. The side of the nose is supplied by an artery that emerges from the infraorbital foramen.
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