上消化道包括（）。

2023-08-09

A.口腔、咽、食管
B.十二指肠、空肠、回肠
C.盲肠、结肠、指肠
D.口腔至十二指肠

参考答案：D

本题考查的是消化系统的组成知识点。

D项，口、咽、食管、胃、小肠、大肠和肛门组成消化管。其中小肠分化出十二指肠、空肠和回肠。大肠分化出盲肠、结肠和直肠。小肠是消化管中最长、最重要的一段，消化作用和全部消化产物的吸收几乎都是在小肠内进行。通常把口腔至十二指肠的一段称为上消化道；空肠至肛门的一段称为下消化道。故正确。

综上，正确答案为D。

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