Question

name of the longest or main vein in our body ?

Answer 1

All the arteries of the body, save the pulmonary arteries, stem from the aorta or one of its main branches. Vena Cava are large veins that return deoxygenated blood from the body into the heart. In humans they are called the superior vena cava and the inferior vena cava, and both empty into the right atrium.

Answer 2

These are two large veins which enter the right atrium of the heart from above and below. The superior vena cava carries blood from the arms and head to the rightatrium of the heart, while the inferior vena cava carries blood from the legs and abdomen to the heart.
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