What are the major veins that deliver low oxygenated blood to heart?

The major veins that deliver low oxygenated blood to heart are:

- Superior vena cava (SVC): The SVC is a large vein that collects deoxygenated blood from the upper body, including the head, neck, arms, and chest. It empties into the right atrium of the heart.

- Inferior vena cava (IVC): The IVC is the largest vein in the body and collects deoxygenated blood from the lower body, including the abdomen, pelvis, and legs. It also empties into the right atrium of the heart.

- Coronary sinus: The coronary sinus is a vein that collects deoxygenated blood from the heart muscle itself. It empties into the right atrium of the heart.

These veins are essential for maintaining the circulation of blood throughout the body and ensuring that the heart receives the oxygen-poor blood that it needs to pump to the lungs.