human heart with circulatory system

human heart circulatory system aorta aortic arteries artery atrium bicuspid blood capillaries carbondioxide cava chambers deoxygenated mitral organ oxygenated pericardium pulmonary rich tricuspid valve vein vena ventricle there are two atria left receives lung circulation right venae cavae venous receive while relaxed diastole then contract systole move ventricles