Fun fact about spaceFun facts about human bodyAmazing facts about the human bodyAmazing things the human body can doDirty facts about humans50 amazing facts about human bodyImportant and interesting facts about human body parts PDFInteresting facts about Earthmind-blowing facts about human bodyAmazing facts about human cellsAnatomy humanThe human body25 Amazing Facts About the Human Body - Mental Floss
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25 Amazing Facts About the Human Body ; Wisdom teeth serve no purpose. They're left ... Thehumanbodyisanamazingpieceofmachinery—withafewweirdquirks. It’spossibletobrushyourteethtooaggressively.Doingsocanweardownenamelandmaketeethsensitivetohotandcoldfoods. Goosebumpsevolvedtomakeourancestors’hairstandup,makingthemappearmorethreateningtopredators. iStock.com/MyetEckWisdomteethservenopurpose.They’releftoverfromhundredsofthousandsofyearsago.Asearlyhumans’brainsgrewbigger,itreducedspaceinthemouth,crowdingoutthisthirdsetofmolars.Scientistsaren'texactlysurewhyweyawn,butitmayhelpregulatebodytemperature.Yourfingernailsdon’tactuallygrowafteryou’redead.Iftheywerelaidendtoend,allofthebloodvesselsinthehumanbodywouldencircletheEarthfourtimes.Humansaretheonlyanimalswithchins.iStock.com/mhelm3011Asyoubreathe,mostoftheairisgoinginandoutofonenostril.Everyfewhours,theworkloadshiftstotheothernostril.Bloodmakesupabout8percentofyourtotalbodyweight.Thehumannosecandetectabout1trillionsmells.Youhavetwokidneys,butonlyoneisnecessarytolive.Bellybuttonsgrowspecialhairstocatchlint.iStock.com/PeopleImagesThesatisfyingsoundofcrackingyourknucklescomesfromgasbubblesburstinginyourjoints.Skinisthebody’slargestorganandcancomprise15percentofaperson’stotalweight.Thumbshavetheirownpulse.Yourtongueismadeupofeightinterwovenmuscles,similarinstructuretoanelephant’strunkoranoctopus’stentacle.Onageneticlevel,allhumanbeingsaremorethan99percentidentical.iStock.com/BorupFotoThefootisoneofthemostticklishpartsofthebody.Extraocularmusclesintheeyearethebody’sfastestmuscles.Theyallowbothofyoureyestoflickinthesamedirectioninasingle50-millisecondmovement.Asurgicalprocedurecalledaselectiveamygdalohippocampectomyremoveshalfofthebrain’samygdala—andwithit,thepatient’ssenseoffear.Thepinealgland,whichsecretesthehormonemelatonin,gotitsnamefromitsshape,whichresemblesapinenut.Hairgrowsfast—about6inchesperyear.Theonlythinginthebodythatgrowsfasterisbonemarrow.iStock.com/GlobalStock Noonereallyknowswhatfingerprintsarefor,buttheymighthelpwickwaterawayfromourhands,preventblisters,orimprovetouch. Theheartbeatsmorethan3billiontimesintheaveragehumanlifespan. Blushingiscausedbyarushofadrenaline.
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