In the human body, blood flows through a process of double circulation. Which one of the following statements is true in this regard ?
1
Oxygenated blood reaches the left side of the heart from the lungs.
2
Blood in the left side of the heart is poor in oxygen and is brought to the right side of the heart.
3
Deoxygenated blood from the left side of the heart is brought to the lungs for oxygenation.
4
Oxygenated blood from the right side of the heart is sent around the body.