But itâs not always so easy to tell whether an assignment is asking you to include comparison/contrast. And in some cases, comparison/contrast is only part of the essayâyou begin by comparing and/or contrasting two or more things and then use what youâve learned to construct an argument or evaluation.
The inferior vena cava carries blood from the lower half of the body whilst the superior vena cava carries blood from the upper half of the body. It is formed by the joining of the right and the left common iliac veins, usually at the level of the fifth lumbar vertebra.n the left, they drain into the renal vein which in turn drains into the inferior vena cava. By contrast, all the lumbar veins and hepatic veins usually drain directly into the inferior vena cava.
After circulating through the body systemically, deoxygenated blood returns to the right atrium of the heart through either the superior vena cava, which drains the upper body, or the IVC that drains everything below the diaphragm, including the lower trunk, abdomen, pelvis, and lower limbs.natomy. The inferior vena cava (IVC, also known as the posterior vena cava) is a large diameter vein that is located posterior to the abdominal cavity and runs alongside of the right side of the vertebral column (thus making it a retroperitoneal structure), with the aorta lying laterally on the left of the IVC.