According to the concept of sagittal spinal balance, the alternating curves of cervical and lumbar lordosis and thoracic and sacral kyphosis enable the head to be positioned over the trunk and pelvis.
根据矢状面上脊柱平衡的理念，颈椎和腰椎的前凸，胸椎和骶椎的后凸构成的交替曲线使头能够定位与躯体和骨盆的上方。
Veins of the madial-caudal cervical segment of the esophagus and trachea were drained into the esophatracheal vein trunk.
回流食管和气管颈段中后部血液的静脉汇入食管气管静脉干；
The postganglionic neurons were mainly located in the stellate ganglion (61.99%), anterior and middle cervical ganglia, and T_2-T_5 ganglia of the sympathetic trunk, bilaterally.
交感节后神经元位于双侧星状神经节(61.99%)和颈前、颈中、T _(2 ~ 5)交感干神经节。
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