Cardiac muscle The major types of cardiac muscle Atrial muscle Contractile cells (收缩细胞) Ventricular muscle Specialized excitatory and conductive Autorhythmic cells muscle (自律细胞)• The major types of cardiac muscle: – Atrial muscle – Ventricular muscle – Specialized excitatory and conductive muscle Contractile cells (收缩细胞) Autorhythmic cells (自律细胞) Cardiac muscle 6