What are the four great vessels of heart?

The four great vessels of the heart are:

1. Aorta: The aorta is the largest artery in the body and carries oxygenated blood from the heart to the rest of the body.

2. Pulmonary artery: The pulmonary artery carries deoxygenated blood from the heart to the lungs for oxygenation.

3. Pulmonary vein: The pulmonary vein carries oxygenated blood from the lungs to the heart.

4. Superior and inferior vena cava: The superior and inferior vena cava carry deoxygenated blood from the upper and lower body respectively, to the heart.