食管
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人(rén )和(hé )动(dòng )物(wù )连(lián )接(jiē )咽(yān )头(tóu )和(hé )胃(wèi )的(de )管(guǎn )状(zhuàng )器(qì )官(guān )。食(shí )物(wù )经(jīng )口(kǒu )腔(qiāng )从(cóng )咽(yān )头(tóu )进(jìn )入(rù )食(shí )管(guǎn ),管(guǎn )壁(bì )肌(jī )肉(ròu )收(shōu )缩(suō )时(shí )可(kě )将(jiāng )食(shí )物(wù )送(sòng )到(dào )胃(wèi )裡(lǐ )。
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