True about SA node is all except
Supplied by nodal aery
Primary pacemaker
Supplied by left vagus nerve
Made up of nodal cells and connective tissue
Sinoatrial Node (SA node) It is known as the pacemaker of the hea.It generates an impulse at the rate of about 70/min and initiates the heabeat.It is horseshoe-shaped and is situated at the atriocaval junction in the upper pa of the sulcus terminalis.The impulse travels through the atrialwall to reach the AV node. Except for a pa of the left branch of the AV bundle supplied by the left coronary aery the whole of the conducting system is usually supplied by the right coronary aery. <img src=" /> REF.B D Chaurasia's human anatomy vol.1,fifth edition
Thorax