thalassemia is a disease that affects hemoglobin, the oxygen car

aorta artery atrium bicuspid valve biology blood flow vessel capillary cardiac muscle septum wall cardiovascular system chest pain contraction coronary cure disease emergency treatment endocardium healing health heart attack catheterisation medicine left ventricle obstruction organ papillary pericardium pulmonary circulation vein right semilunar stent sternum stethoscope symptom systemic