Zuciya dai murdaddiyar sashin jiki ce a mafi yawan dabbobi, wanda farashin sa jini ta cikin jini daga cikin jijiyoyi . Jinin da aka zubo yana ɗaukar oxygen da abinci mai gina jiki zuwa jiki, yayin ɗaukar dattin rayuwa kamar su carbon dioxide zuwa hunhu . A cikin mutane, zuciya kusan girman dunƙulen hannu ne kuma tana tsakanin huhu, a tsakiyar ɓangaren kirji . A cikin mutane, wasu dabbobi masu shayarwa, da kuma tsuntsaye, da zuciya ne zuwa kashi hudu da bẽnãye: babba hagu da kuma dama atria da kuma ƙananan hagu da kuma dama ventricles . Galibi ana kiran atrium na dama da ventricle tare azaman zuciyar dama da takwarorinsu na hagu kamar zuciyar hagu . Akasin haka, kifi yana da dakuna biyu, atrium da ventricle, yayin da dabbobi masu rarrafe suna da dakuna uku. A cikin lafiyayyar zuciya, jini yana gudana ta hanya guda ta cikin zuciya saboda bugun zuciya, wanda ke hana sake komowa . Zuciya a rufe take cikin jakar kariya, pericardium, wanda kuma ya ƙunshi ƙaramin ruwa . Bangon zuciya yana da tsari uku: epicardium, myocardium, da endocardium .