Which of the following routes for blood circulation is correct in order?
1
Superior vena cava → Right atrium → Right ventricle → Pulmonary veins → Left atrium → Left ventricle → Aorta
2
Superior vena cava → Left atrium → Left ventricle → Pulmonary artery → Right atrium → Right ventricle → Aorta
3
Superior vena cava → Right atrium → Right ventricle → Pulmonary artery → Left atrium → Left ventricle → Aorta
4
Superior vena cava → Right atrium → Right ventricle → Pulmonary veins → Right atrium → Left ventricle → Aorta