Plaque buildup while in the arteries is named atherosclerosis. The buildup leads to the arteries to harden and turn into narrower after some time. This will lower or block blood circulation to the center muscle. The illustration includes a heart and a few pictures of the artery that contains plaque. https://rafaelxgou63963.wikiworldstock.com/1369975/solidworks_nejobl%C3%ADben%C4%9Bj%C5%A1%C3%AD_cad_software_pro_profesion%C3%A1ln%C3%AD_konstrukt%C3%A9ry_a_in%C5%BEen%C3%BDry