Kalmar “jini na mahaifa” tana nufin duk wata jijiyar da ke ratsa cikin wuyan wuyanta kuma tana fitar da jini daga kai, wuya, da ƙaho na sama zuwa zuciya. Akwai jijiyoyin mahaifa da yawa, gami da jijiya jugular na ciki, jijiya jugular waje, da jijiyar vertebral. Wadannan jijiyoyin suna taka muhimmiyar rawa a cikin tsarin jijiyoyin jini ta hanyar jigilar jinin da aka cire daga saman jiki zuwa zuciya.