(i) Blood vessel A – It carries carbon dioxide rich blood to the lungs.(ii) Blood vessel B – It carries oxygen rich blood from the lungs.(iii) Blood vessel B – Left atrium relaxes as it receives blood from this blood vessel.(iv) Blood vessel A – Right atrium has thick muscular wall as it has to pump blood to this blood vessel.The correct statements are(a) (i) and (ii) only(b) (ii) and (iii) only(c) (ii), (iii) and (iv)(d) (i), (ii) and (iii).(d) (i), (ii) and (iii).
Explanation
Blood vessel A represents the pulmonary artery, while blood vessel B signifies the pulmonary vein.
The key functions of these blood vessels are:
- Pulmonary artery: Carries deoxygenated blood from the right ventricle of the heart to the lungs for oxygenation.
- Pulmonary vein: Transports oxygen-rich blood from the lungs to the left atrium of the heart.
