Question

Sort the parts according to the order in which deoxygenated blood travels from the heart to the lungs:

• A. $2-1-3-4$
• B. $2-4-1-3$
• C. $4-2-1-3$
• D. $3-1-2-4$

Answer 1

The correct option is B $2-4-1-3$

The deoxygenated blood, coming from all parts of the body, enters the right atrium. This blood is passed on to the right ventricle from where it is transported to the lungs through the pulmonary artery. The deoxygenated blood is oxygenated here and sent back to the heart.