Ko ngā mīhini whakangungu porowhita he rōpū mīhini whakakori tinana tūmau e whakaata ana i te piki, te eke pahikara, te oma, te hikoi rānei. I ētahi wā ka whakarāpopototia ngā mīhini whakangungu porowhita, ka kiia hoki ko ngā mīhini whakakori tinana porowhita me ngā mīhini whakangungu porowhita. Ko ngā mahi piki, eke pahikara, oma, hikoi rānei ka puta he pēhanga ki raro i ngā hononga o te tinana. Heoi, ko ngā mīhini whakangungu porowhita ka whakaata i ēnei mahi me te iti noa o ngā pēhanga hononga e pā ana. Kei roto i ngā pokapū whakapakari tinana me ngā karapu hauora ngā mīhini whakangungu porowhita, ā, kei roto tonu i ngā kāinga. Haunga te whakarato i tētahi whakakori tinana iti te pānga, ka tukuna hoki e ēnei mīhini he whakakori tinana pai mō te ngākau.