Magazi amaundana chifukwa cha kukhuthala kwa magazi komanso kuyenda pang'onopang'ono kwa magazi, zomwe zimapangitsa kuti magazi aziundana.

Pali zinthu zolimbitsa magazi m'magazi. Mitsempha yamagazi ikatuluka magazi, zinthu zolimbitsa magazi zimayatsidwa ndipo zimamatira ku ma platelet, zomwe zimapangitsa kuti kukhuthala kwa magazi kuchuluke ndipo kuyenda kwa magazi kuchepe, motero kuletsa kutuluka kwa magazi m'mitsempha yamagazi. Kulimbitsa magazi ndikofunikira kwambiri pa hemostasis yachibadwa ya thupi la munthu. Kulimbitsa magazi kumatanthauza njira yosinthira magazi kuchoka pa mkhalidwe wamadzimadzi kupita ku mkhalidwe wolimba. Kulimbitsa magazi ndi njira yowonjezera ya zinthu zingapo zolimbitsa magazi. Fibrinogen imayatsidwa kukhala fibrin kuti ipange fibrin clot kuti ikwaniritse cholinga cha hemostasis. Thupi la munthu likavulala, ma platelet amalimbikitsidwa ndi gawo lovulala, ma platelet amayatsidwa, ndipo ma clots ophatikizana amaonekera, omwe amachita gawo lalikulu la hemostatic. Kenako ma platelet amasinthidwa kwambiri kuti apange thrombin, yomwe imasintha fibrinogen mu plasma yoyandikana nayo kukhala fibrin. Fibrin ndi ma platelet clot zimagwira ntchito nthawi imodzi kukhala thrombi, zomwe zimatha kuyimitsa kutuluka magazi bwino.

Wodwala akavulala, ngati magazi sanatseke, pitani kuchipatala kuti mukalandire chithandizo nthawi yomweyo.