Which node serves as the pacemaker of the heart
- Which node is the pacemaker of the heart
- Which node acts as the pacemaker of the heart
- Normally the node serves as the pacemaker of the heart
- Which node is known as the pacemaker of the heart
- Which node is defined as the pacemaker of the heart
- Which node is referred to as the pacemaker of the heart
- Which node acts as the natural pacemaker of the heart