Izixhobo zombane zeClass I azihambelani nenkqubo ethile yokuhlela.
Kwizixhobo zombane zeClass II, ulwahlulo luchongwa luhlobo lwerhasi enokutsha edibana nayo. Esi sixhobo siphinda sahlulwe saba ziindidi ezintathu ezinobungqina bokudubula: IIA, IIB, kunye ne-IIC.
Kwiindawo ezisebenzisa izixhobo zombane zodidi lokuqala, apho iigesi ezinokutsha ngaphandle imethane zikhona, ukuthotyelwa kwemigangatho yomibini iClass I kunye neClass II-proof-proof-proof kunyanzelekile.
Ngokusekelwe kwiimpawu ezithile ze qhuma indawo yothuli, Izixhobo zombane zeClass III zahlulwe zibe ziindidi ezintathu: IIIA, IIIB, kunye ne-IIC.