上気道

じょうきどう

noun

•

upper respiratory tract, upper airway

上	above, up
気	spirit, mind, air, atmosphere, mood
道	road-way, street, district, journey, course, moral, teachings

あおむ

ね

、

した

おく

さ

、

じょうきどう

ふさ

If you sleep on your back it's easier for your upper airway to be obstructed because your tongue, uvula, etc. slip towards the back of your throat