Question

The post caval vein is constituted by:
a) Renal, gonadal and hepatic veins
b) renal and gonadal
c) Hepatic and gonadal veins
d) Renal and hepatic veins

Answer 1

Hint: Blood is transported in our body through blood vessels. Blood vessels are of three types- veins, arteries and capillaries. Each of them is structurally and functionally different. Vena cava is the largest veins of our body. The function of veins is to carry deoxygenated blood from the body to the heart.

Complete answer:
To answer this question, we must understand the anatomy of the inferior vena cava:
Vena cava is the largest veins of our body. It has two major trunks- superior vena cava and inferior vena cava. The inferior vena cava is also called posterior vena cava or post caval vein. The superior vena cava or anterior vena cava drains the blood from the upper parts of the body and inferior vena cava or superior vena cava drains blood from the lower parts of the body.
The inferior vena cava is also known as posterior vena cava, is posterior to abdominal cavity and lies on the right side of aorta laterally. It is retroperitoneal in structure.
The inferior vena cava is the largest and widest vein of the body. It is formed by union of the right and left iliac veins in front of the body of L5 vertebra below the aortic bifurcation. It pierces the central tendon of the diaphragm at the level of T8 vertebra and terminates by entering the right atrium of the heart. The inferior vena cava extends across eight vertebrae and is about twice the length of abdominal aorta.
The inferior vena cava receives the following tributaries: median sacral, common iliac, inferior phrenic, lumbar veins, hepatic veins, renal veins, right gonadal and right suprarenal.
The inferior vena cava is one of the two large veins by which blood is returned from the body to the right side of the heart. After circulating the blood systematically, deoxygenated blood returns to the right atrium. The inferior vena cava drains the body below the diaphragm including lower trunk, abdomen, pelvis and lower limbs.

Thus, the correct answer is option A- Renal, Hepatic and Gonadal veins.

Note: The inferior vena cava is also known as posterior vena cava, is posterior to abdominal cavity and lies on the right side of aorta laterally. It is retroperitoneal in structure.