Babban jijiya na huhu shine jigon jini wanda ke ɗaukar jinin oxygen daga saman lobe na huhu na hagu zuwa atrium na hagu na zuciya. "Mafi girma" yana nufin wurin da yake, wanda ya fi girma a cikin huhu fiye da ƙananan jijiyar huhu, wanda ke ɗaukar jini daga ƙananan lobe na huhu na hagu. Kalmar "pulmonary" tana nufin huhu, "jijiya" kuma tana nufin magudanar jini da ke ɗaukar jini zuwa zuciya.