state gov UPSSSC Forest Guard Mock Test 2023 General Science Biology Human body

Course of blood circulation in human heart is

1
Left atrium → Right ventricle → Left ventricle →  Right atrium
2
Left ventricle → Left atrium → Lungs → Right atrium →  Right ventricle
3
Right atrium →  Right ventricle →  Lungs →  Left atrium →  Left ventricle
4
Left atrium →  Left ventricle → Lungs →  Right atrium →  Right ventricle
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