Question

To go to the left side of the heart from the right side the blood will have to cross

• A. Liver
• B. Lungs
• C. Kidney
• D. Brain

Answer 1

The correct option is B Lungs

• Humans have a complete four-chambered heart characterized by double circulation and the blood passes twice through the heart during one cardiac cycle.
• The right side of the heart carries deoxygenated blood, which is pumped to the lungs from the right ventricle for oxygenation.
• The oxygenated blood is received by left ventricle from the lungs. The left ventricle pumps blood to the body for circulation. Thus there is complete separation between deoxygenated and oxygenated blood.

So the correct answer is option D.