Kumndilili wendoda endala kukho malunga ne-5 quarts (4.75 ilitha) yegazi, eyenziwe malunga neelitha ezi-3 (iilitha eziyi-2.85) zeplasma kunye neelitha ezi-2 (1.9 ilitha) zeeseli.
Iiseli zegazi zixhonywe kwiplasma, eyenziwe ngamanzi kunye nezinto ezinyibilikisiweyo, kubandakanya iihomoni, izilwa-buhlungu, kunye nee-enzymes ezithwalwa kwizicubu, kunye neemveliso zenkunkuma zeselula ezithwalwa emiphungeni nasezintso.
Iiseli ezinkulu zegazi zihlelwa njengeeseli ezibomvu (i-erythrocytes), iiseli ezimhlophe (i-leukocytes), kunye neeplatelet (i-thrombocytes).
Iiseli ezibomvu ziyimizimba eethe-ethe, engqukuva, ene<em>hemoglobin, umchiza ontsonkothileyo othwala ioksijini nekharbon diokside.
IHemolysis yenzeka xa inwebu ebhityileyo ekhuselayo evale iiseli ezibomvu eethe-ethe igqabhuka, nto leyo evumela ukuba ihemoglobin ibaleke iye kwiplasma.I-Hemolysis inokubangelwa kukuphathwa kakubi kwe-specimen yegazi, ukushiya i-tourniquet ixesha elide (okubangela i-blood stasis) okanye ukucinezela incam yomnwe kakhulu ngexesha lokuqokelela i-capillary, i-dilution, ukuvezwa kwizinto ezingcolileyo, ubushushu obugqithisileyo, okanye iimeko ze-pathologic.
