【Whilelearningthesciencelessons，Iusedtogetadoubt—whyear，nose，tongueandeyesshouldbecalledasspecialsenses？Thebasicreasonisthatthesearethechannelsthroughwhichwemaintaincontactwiththesurroundings.Thoughapp】

　　Whilelearningthesciencelessons，Iusedtogetadoubt—whyear，nose，tongueandeyesshouldbecalledasspecialsenses？Thebasicreasonisthatthesearethechannelsthroughwhichwemaintaincontactwiththesurroundings.Thoughapparentlyitmayfeelliketheseareindividualsensoryorgans，theydoshowsomeconnectivity.Interestingly，ourhearingislesssharpafterweeataheavyfood.Isn’titgoodforasoundnapafterastomach­fullmeal？Thatdoesnotmeanwegodeafafterameal，butthehearingpitch(强度)doeschangeafteraheavymeal.

　　Weusuallygivecreditofthetastetoourtongue，butdoyouknowthatunlesssaliva(唾液)dissolvessomething，ourtonguecannotrecognizethetasteofthefoodeaten.Tasteisnothingbutthefoodchemicalsdissolvedinthesalivabeingsensedbythetastebudspresentonthetongue.Try_to_dry_off_your_tongue_and_mouth_with_a_tissue_paper_and_then_taste_something.

　　Womenaremuchbettersmellersthanmen.Theyarebornwiththischaracteristicabilityandcancorrectlypinpointtheexactfragranceofthesample.Weallcanstorealmost50,000differentscents(气味)，whicharestronglytiedtothememories.

　　Pupils(瞳孔)donotrespondtolightalone，buttotheslightestbitofnoisearoundtoo.Thussurgeons，watchmakersandthoseprofessionalswhohavetoperformamuchdelicatejobdoprefertohaveasound­freeenvironment.Evenasmallnoisecandilate(扩大)theirpupils，changethefocusandblur(使模糊)theirvision.Ifyoudonotwearglassesorcontactlensduetohavinga6/6vision，youarejustamongtheonethirdofthehumanpopulation.Itisnowstatisticallyprovedthatonlyonethirdofthepopulationhasperfectvision，restallareeitherwearingglassesoraretryingtoreadwithacompromisedvision.

　　Eachandeveryoneofushasaparticularorindividualisticorcharacteristicsmell，whichisuniquetous，exceptfortheidenticaltwins.Thissmellisverysubtle(微妙的)yetcanbesensedevenbyanewborn.Itmaybeduetothisscentthatthenewbornrecognizesthepresenceofhisparentsaround.Manyofuscanpinpointthesmellofoursignificantfriendsandcolleagues.Asignificantpartofthisphenomenonisguidedbygeneticsbutitisalsomodifiedbytheenvironment，dietandpersonalhygiene.Thisalltogethercreatestheuniq