PHLEBOTOMY NATIONAL EXAM (NHA) Questions AND ANSWERS UPDATED 2026

PHLEBOTOMY NATIONAL
EXAM (NHA) Questions
AND ANSWERS UPDATED
2026
CharacteristicsBimperativeBtoBaBphlebotomistB-
BAnswerBDependability,Bhonesty,Bintegrity,BempathyBandBcompassion,BprofessionalBapp
earance,BinterpersonalBskills



CirculatoryBsystemBfunctionB-
BAnswerBdeliverBoxygen,Bnutrients,Bhormones,B&BenzymesBtoBcellsBandBtransportBcell
ularBwasteB(CO2)BtoBorgansBwhereBtheyBcanBbeBexpelled



TheBtwoBcirculationsB-BAnswerBPulmonaryB&BSystemic



PulmonaryBcirculationB-
BAnswerBcarriesBdeoxygenatedBbloodBfromBtheBrightBventricleBtoBtheBlungsBandBretur
nsBoxygenatedBbloodBfromBlungsBtoBleftBatrium



WhereBdoesBoxygenationBtakeBplaceBinBtheBlungs?B-BAnswerBalveoli



SystemicBcirculationB-
BAnswerBcarriesBoxygenatedBbloodBfromBleftBventricleBthroughoutBtheBbody



UpperBchambersBofBtheBheartB-BAnswerBrightBandBleftBatria



lowerBchambersBofBtheBheartB-BAnswerBrightBandBleftBventricle



tricuspidBvalveB-
BAnswerBatrioventricularBvalve,BsituatedBbetweenBrightBatriumBandBrightBventricle

,**toBrememberBthisBvalveBisBonBtheBrightBsideBofBtheBheart--
BpeopleBTRYBtoBbeBRIGHT



pulmonicBvalveB-BAnswerBsemi-
lunarBvalveBsituatedBbetweenBtheBrightBventricleBandBtheBpulmonaryBartery



MitralBvalveB(orBbicuspid)B-
BAnswerBatrioventricularBvalveBlocatedBbetweenBtheBleftBatriumBandBleftBventricle



aorticBvalveB-
BAnswerBsemiBlunarBvalveBsituatedBbetweenBtheBleftBventricleBandBaorta



FlowBofBbloodBthroughBtheBheartB-
BAnswerBSuperiorBandBInferiorBVenaBCavae<BRightBatrium<BtricuspidBvalve<BrightBvent
ricle<BpulmonicBvalve<BpulmonaryBartery<Blungs<BpulmonaryBvein<BleftBatrium<Bmitral
B(bicuspid)Bvalve<BleftBventricle<Baorta<BrestBofBbody



ThreeBlayersBofBtheBheartB-BAnswerBEndocardium,Bmyocardium,Bepicardium



BloodBvesselsB-
BAnswerBarteries,Barterioles,Bcapillaries,Bvenules,Bveins,BsuperiorB&BinferiorBvenaBcava
e



aorta,Barteries,BandBarteriolesBcarry_____BbloodB_______BtheBheartB-
BAnswerBoxygenatedB&BawayBfrom



venules,Bveins,BandBsuperiorBandBinferiorBvenaBcaveBcarryB_____BbloodB________Bthe
BheartB-BAnswerBdeoxygenatedB&BbackBto



TheBaverageBadultBhasB______BlitersBofBbloodB-BAnswerB5-6

, PlasmaBcomprisesBhowBmuchBofBcirculatingBblood?B-BAnswerB55%



PlasmaBcontains....B-
BAnswerBproteins,BaminoBacids,Bgases,Belectrolytes,Bsugars,Bhormones,Bminerals,Bvitam
ins,BandBwater



WhatBpercentBofBplasmaBisBwater?B-BAnswerB92%



FormedBelementsBcompriseBwhatBpercentBofBcirculatingBblood?B-BAnswerB45%



anotherBnameBforBredBbloodBcells...B-BAnswerBErythrocytes



WhatBmakesBupBtheBformedBelements?B-
BAnswerBRedBbloodBcells,BWhiteBbloodBcells,BandBplatelets



AnotherBnameBforBwhiteBbloodBcells...B-BAnswerBleukocytes



anotherBnameBforBplatelets...B-BAnswerBthrombocytes



WhatBcomprisesB99%BofBtheBformedBelements?B-
BAnswerBredBbloodBcellsB(erythrocytes)



WhereBdoBbloodBcellsBoriginate?B-BAnswerBstemBcellsBinBboneBmarrow



HowBmanyBRBCsBareBinBaBmicroliterBofBblood?B-BAnswerB4.2BtoB6.2Bmillion



NormalBlifeBspanBofBanBRBSBis...B-BAnswerB120Bdays



FunctionBofBaBleukocyteB-BAnswerBprovideBtheBbodyBprotectionBagainstBinfection