Question

The inferior Vena Cava.
A. Divides into hepatic portal veins
B. Opens into the left auricle
C. Commences at the kidney
D. Begins at the hind end of the abdomen.

Answer 1

Heart is a muscular and important organ or major organ of the body. It comes under the circulatory system as its function is to pump blood throughout the body. If a heart stops working the person could die. It is that essential organ. The heart is about the size of our fist located behind and slightly left of the breastbone. Functions of the heart include pumping oxygenated blood to the other body parts.

Complete answer:
Option A divides into hepatic portal veins- The portal vein or hepatic vein is a blood vessel that carries blood from the gastrointestinal tract, gallbladder, pancreas and spleen to the liver. The nutrients and poisons taken from the digested food are found in this blood. Examples of portal vein are- venous blood to the liver. The pancreatic vein joins the superior mesenteric, splenic, inferior mesenteric, left, and right gastric veins.
So, option A is not correct.
Option B opens into the left auricle- the atria-ventricular node is the part of the electrical conduction system of the heart that coordinates the top of the heart. From the atria to the ventricles, it transports the usual electrical impulse. Commonly the right atrium and ventricle are referred together as the right heart and their left atrium and left ventricle are called the left heart. In a healthy heart blood flows one way through the heart due to heart valves which prevent backflow of blood.
Option B is not correct.
Option C Commences at the kidney- kidney contains nephrons as structural and functional units. Vena cava does not imply a kidney as it is not a part of the kidney. It is a part of the heart.
Option C is not correct.
Option D Begins at the hind end of abdomen- Vena cava begins from the left and right iliac veins behind the abdomen. Both the inferior and posterior vena cava run behind the abdominal cavity. It does pass through the thoracic diaphragm at the cava opening of level $T8 - T9$.
Option D is correct.

Hence, Option D is the correct answer.

Note:
The heart has four chambers as we know, two upper atria the receiving chambers and two lower ventricles the discharging chambers. The distinction is on the surface of the heart called coronary sulcus. It forms the atrioventricular septum which separates the atria from the ventricles and the fibrous rings which serve as bases for the four heart valves. An adult heart beats $100,000$ times a day. A normal resting heart beat is $60 - 100$ times per minute. It depends on the cardiovascular fitness.