The refractory period of cardiac muscle is much longer than that of skeletal muscle. Why is this a desirable functional property? (a) Name the elements of the intrinsic conduction system of the heart...

The refractory period of cardiac muscle is much longer than that of skeletal muscle. Why is this a desirable functional property?

(a) Name the elements of the intrinsic conduction system of the heart in order, beginning with the pacemaker.

(b) What is the important function of this conduction system?