不定向
A心脏
B十二指肠
C肺
D降结肠
E横结肠
正确答案
答案解析
[解析] 迷走神经前、后干于贲门附近分别发出分支分为胃前支和肝支、胃后支和腹腔支。在结肠仅分布于结肠脾曲以上的结肠，降结肠和乙状结肠则由骶2-4脊髓节的副交感神经分布。
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