Da Ana amfani da injin tsotsa don tsotse zubar jini, exudation, kwari, da abin da ke ciki a cikin gabobin Tholacik yayin aikin don yin aikin gurbata da rage damar gurbata. Ana iya rarrabu cikin irin wannan azaman lantarki Injin inction , injin lantarki na wayar lantarki da sauransu.