Question

Hepatic portal system starts from

• A. digestive system to liver
• B. kidney to liver
• C. liver to heart
• D. liver to kidney

Answer 1

The correct option is A

digestive system to liver

Explanation of the correct option:

The correct option is A:

1. Some veins collect blood from a certain body part by a set of capillaries and send it to another part by another set of capillaries, which are called portal veins.
2. The portal veins along with the capillaries are known as the portal system.
3. The hepatic portal system is defined as the transportation of deoxygenated blood from the digestive tract to the liver through a system of veins.
4. The quantity of nutrients that flows in the blood is regulated by the hepatic portal system.

Explanation of the incorrect options:

Option B:

1. The main function of kidneys is the filtration or the excretion of waste products, drugs, and toxins through the urine.
2. There are no products that are transported from the kidney to the liver.

Option C:

1. The oxygenated blood is transported from the lungs to the liver through the hepatic artery.
2. After it gets deoxygenated in the liver, it travels to the heart.

Option D:

1. The liver is the place where the waste products such as urea (produced by the breakdown of amino acids) are produced in the body.
2. To get rid of the toxicity, these are transported from the liver to the kidney.

Hence, the hepatic portal system starts from the digestive system to the liver.