Inka

Rumen ni igice cyingenzi muri sisitemu yifunguro yinka isenya selile nibindi bikoresho byibimera. Ariko, kubera ko inka akenshi zihumeka ibintu byicyuma mugihe zimira ibiryo, nkimisumari yinka, insinga zicyuma, nibindi, ibyo byuma birashobora kwirundanyiriza mumitsi, bigatera ibimenyetso byumubiri byamahanga. Imikorere ya rukuruzi ya rumen nugukurura no gukusanya ibintu byicyuma muri rumen, kubarinda kurakaza urukuta rwa rumen, no kugabanya ibibazo nibimenyetso biterwa numubiri wamahanga muri rumen. Uwitekarumen magnetikurura ibintu byuma bya magnetiki, kugirango bishyirwe kuri magneti, bikabuza gukomeza kugenda cyangwa kwangiza urukuta rwa rumen.