【听力文摘】哭的时候为什么会流鼻涕？x
更新时间:2022-09-27 17:14:21 阅读： 评论：0
【听力文摘】哭的时候为什么会流鼻涕?
WhyDoesCryingMakeYourNoRun?
Whenyouburstoutcrying,youexpecttheblearyredeyesandtheriversoftearsthatstreamdownyourcheeks.Butontopofallthat,yournostartstorunlikeafaucet.Whydoesthishappen?What’stheconnectionbetweencryingandarunnyno?
WhereDoTearsComeFrom?
Tearscomefromtearglandslocatedjustovertheeye,behindthebone.Astearsrindownoveryoureye,theycollectattherimsofyourlowereyelids,wheresomemayoverflowandstreamdownyourcheeks.
Butthat’snottheonlyescaperouteforoverflowingtears.Ifyoulookveryclolyatthei
nsideofyoureyelid,rightnearyourno,you’ellatinylittlehole.Youmightneedtogentlypullyoureyeliddowntoeit,becauit’sontheinneredgeoftheeyelid,restingagainsttheeye.
RiverTears
Thelittleholes,ontheupperandlowereyelidsofbotheyes,rveasdrainsandleadi
ntocanalsthatrunthroughgroovesinthebonesofthefaceandeventuallyemptyintoth
eno.Evenwhenyou’renotcrying,someofthenormal,everydaytearsthatmoistenan
dcleanyoureyesdrainoutthroughthiscretpassagewayintotheno,butit’ssucha
smallamountthatyoudon’tnoticeit.
Whenthetearsreallystarttogush,however,thisunnoticeabletrickleturnsintoariver.Asthetearsmaketheirwaydownthroughtheno,theymoistenandloonothercretionsontheway.Andthat’swhenyoureachforatissue!
--fromputclub
