Tichifunga nezvemashoko aya pamusoro pemwoyo womunhu, ndiudze nezvezvinhu zvikuru zvinoumba mwoyo womunhu uyewo chinangwa chikuru chomuviri wacho.
Context:Mwoyo inhengo ine tsandanyama mumhuka dzakawanda. Uropi uhwu hunopomba ropa nomumidziyo yeropa yetsinga dzinofambisa ropa. Ropa rinoputirwa rinotakura okisijeni nezvinovaka muviri mumuviri, nepo richitakura tsvina inenge yabuda mumuviri yakadai sekabhoni dhayokisaidhi kuenda kumapapu. Muvanhu, mwoyo unenge wakakura sechanza chakavharwa uye uri pakati pemapapu, muchikamu chepakati chechipfuva, chinonzi mediastinum.  Muvanhu, mimwe mhuka, uye shiri, mwoyo wakakamurwa kuva makamuri mana: atria yokumusoro yokuruboshwe neyokurudyi uye ventricles yokumusoro yokuruboshwe neyokurudyi. Kazhinji kacho atrium yokurudyi nemwoyo wemukati zvinonzi pamwe chete mwoyo wokurudyi uye zvavanofananidza nazvo zvokuruboshwe zvinonzi mwoyo wokuruboshwe. Kusiyana neizvi, hove dzine makamuri maviri, atrium uye ventricle, nepo zvipuka zvakawanda zvine makamuri matatu. Mumwoyo une utano ropa rinoyerera nenzira imwe chete nomwoyo nemhaka yemakenduru omwoyo, ayo anodzivisa kudzokera shure. Mwoyo wakaputirwa muhomwe inodzivirira, inonzi pericardium, iyo inewo mvura shomanene. Rusvingo rwomwoyo runoumbwa namativi matatu: epicardium, myocardium, uye endocardium.
Zvimiro zvikuru zvomuviri womunhu ndezvemakamuri ayo mana okupompa ropa. Mwoyo unowanzonzi une rutivi rworuboshwe norurudyi, rutivi rumwe norumwe ruine makamuri maviri - atrium uye ventricle. Makamuri mana ose anoumba zvinhu zvikuru zvokugadzira nhengo yomuviri. Pamwe chete, anobatsira kuti ropa rirambe richiyerera mumuviri wose richipfuura nomumuviri. Mwoyo unewo basa rokutakura zvinhu zvinoraswa neropa kuenda kumitezo inozvigadzira.