Question

In the above diagram, which blood vessel represents vena cava?

• A. (i)
• B. (ii)
• C. (iii)
• D. (iv)

Answer 1

The correct option is D (iv)

The veins carry the deoxygenated blood to the heart. The deoxygenated blood is returned to the heart by the union of the veins which is known as vena cava. In humans, they are called as the superior vena cava and the inferior vena cava and both empty into the right atrium. They are located slightly off-center, toward the right side of the body. The inferior vena cava (or caudal vena cava in some animals) travels up alongside the abdominal aorta with blood from the lower part of the body. It is the largest vein in the human body. The superior vena cava (or cranial vena cava in animals) is above the heart, and forms from a convergence of the left and right brachiocephalic veins, which contain blood from the head and the arms.

So, the correct answer is option D.