食道
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Interest in “食道” spiked on Wikipedia on 2026-02-26.
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2026-02-03峰值:62026-02-25
30天总计:24
要点总结
- 食道 (Esophagus/Oesophagus),人和动物消化管道的一部分,上面連接咽,下面连通胃,紧贴脊柱的腹侧,具有输送食物的功能。
- 食道在平時是呈現扁平狀,當有食物通過時便會擴大。
食道(Esophagus/Oesophagus),人和动物消化管道的一部分,上面連接咽,下面连通胃,紧贴脊柱的腹侧,具有输送食物的功能。食道是條由肌肉組成的可膨胀的中空通道,在最尾端與胃相接的地方有一個贲门括約肌確保胃酸不會逆流至食道中。食道在平時是呈現扁平狀,當有食物通過時便會擴大。食物並非靠著地球重力落入胃中,是藉由食道壁的肌肉進行像波浪般蠕動,強制將食物推入胃中,此外食道還會分泌一種黏液,讓食物可以很容易地通過。
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