البحث
إكتشاف أشخاص جدد وإنشاء اتصالات جديدة وصداقات جديدة
a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract
a bundle of modified heart muscle that transmits the cardiac impulse from the atrioventricular node to the ventricles causing them to contract