Blood enters the center as a result of two huge veins, the inferior and exceptional vena cava, emptying oxygen-very poor blood from the body into the best atrium. A wall of tissue known as the septum separates the left and proper atria and the left and proper ventricle. Valves separate https://loan-like-elastic47788.madmouseblog.com/17349700/4200-loan-no-further-a-mystery