Deoxygenated blood enters the liver through the:

Deoxygenated blood enters the liver through the portal vein. Here are the steps:

1. Deoxygenated blood, which is rich in nutrients from the digestive system, enters the liver through the portal vein.

2. The portal vein is a large vein that carries blood from the stomach and intestines to the liver.

3. Once in the liver, the blood is filtered to remove toxins and other harmful substances.

4. The liver also uses the nutrients in the blood to produce essential proteins and other substances.

5. The cleaned blood then leaves the liver through the hepatic vein and returns to the heart.