ypoglossal nerve同 Cervical nerve (C 21 antenor branch (1)颈总动脉 e Posterior auricular artery Paettnor auric ar nerve common Submental artery e carotid a 位于颈内静 Lingual artery垂 脉内侧,约 Extern carotid artery o 平甲状软骨 Supenor laryngeal artery垂 nsa cervcal, numenor supenor thyroid artery a Cervical nerve Ic 3i anterior ramus 上缘处分为 stemociedomastod brach e Cervical nerve c 4k: antenor amus 颈内动脉和 Supenor thyroid ven e Ansa cervicalis, inferior root Inferor limb Ascend ng cervcal artery e ●Tn cervical anery. 颈外动脉。 其重要结构 o Transversa cereal artery, deap branch Dorsal scapular anery 有颈动脉窦 unsc nerve e Extemal jugular vein Sciencs 和颈动脉小 e Subclavian ve Inferiot bulb垂 球。 o Pectorals m nor Common carotid artery a vanus nerve冈 pectoralis ru ee Thoracoacromial artery e Cephale ven（１）颈总动脉 common carotid a. • 位于颈内静 脉内侧，约 平甲状软骨 上缘处分为 颈内动脉和 颈外动脉。 • 其重要结构： 有颈动脉窦 和颈动脉小 球