ادامه مطلب
نمونه سوال NAVLE شماره 30
One description of a typical heart sound is "lub-dub". What makes the first heart sound (S1) (i.e., the "lub")? A - Mitral and semilunar valves B - Atrial contraction C - Aortic and pulmonic valves D - Atrioventricular valves E - Ventricular filling aswer/D