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Which is the largest vein in the human body?
Human bodyCirculatory system
Quick Answer
The inferior vena cava is the largest vein in the human body. It returns blood from the lower body to the right side of the heart.
The Full Story
The inferior vena cava is the largest vein in the human body and one of the major blood vessels of the circulatory system. It carries deoxygenated blood from the lower limbs, pelvis, and abdomen back to the heart. It runs alongside the spine and joins the right atrium. The vein is essential for completing the circulation loop and maintaining normal blood return. Its large diameter helps accommodate the high volume of blood moving back to the heart.
Key Facts
1.The inferior vena cava returns blood to the heart
2.It is the largest vein
3.It drains the lower body
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"The body’s biggest vein is the main return route to the heart"