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 1.咽下缩肌inferiorconstrictorofpharynx2.第1狭窄(食管入口部)1stconstriction3.气管trachea4.第3狭窄(左主支气管后部)3rdconstriction5.右主支气管rightprincipalbronchus6.胃stomach7.第4狭窄(膈肌食管裂孔部)4thconstriction8.左主支气管leftprincipalbronchu (共 257 字) [阅读本文] >>