The correct option is (b) 2 only.
Explanation
The circulatory system in humans is a double circulation system consisting of pulmonary circulation and systemic circulation. The classification of blood vessels as arteries or veins is primarily based on the direction of blood flow relative to the heart, rather than the oxygen content of the blood they carry.
Statement 1 is Incorrect.
The Pulmonary Artery carries deoxygenated (carbon dioxide-rich) blood, not oxygen-rich blood. It transports this blood from the right ventricle of the heart to the lungs for oxygenation. It is the Pulmonary Vein that carries oxygen-rich blood from the lungs back to the left atrium of the heart.
Statement 2 is Correct.
Blood vessels are classified based on the direction of flow:
- Arteries carry blood away from the heart to various parts of the body.
- Veins carry blood towards the heart from various parts of the body.
Statement 3 is Incorrect.
The Pulmonary Artery carries blood specifically to the lungs for gas exchange. It does not supply the kidneys. The vessel responsible for carrying oxygenated blood to the kidneys is the Renal Artery.
Key Takeaway:
All arteries carry oxygenated blood except the Pulmonary Artery. All veins carry deoxygenated blood except the Pulmonary Vein. The definition of an artery is strictly a vessel that carries blood away from the heart.