Which part of the liver blood supply is derived from the hepatic artery?

• A. 70% to 75%
• B. 25% to 30%
• C. 50% to 60%
• D. 10% to 15%

Answer: (B)

The correct answer is based on the understanding of liver blood supply, which receives blood from two primary sources: the hepatic artery and the portal vein. The hepatic artery supplies oxygenated blood to the liver, while the portal vein carries nutrient-rich blood from the gastrointestinal tract.

The hepatic artery provides approximately 25% to 30% of the liver's total blood supply. This percentage reflects its role in delivering oxygenated blood necessary for the liver's metabolic functions. The portal vein, on the other hand, delivers about 70% to 75% of the blood supply, which is predominantly deoxygenated but rich in nutrients, as it comes directly from the intestines and spleen.

Understanding these percentages is crucial for clinical contexts, including surgeries or interventions involving the liver, liver diseases, and transplant considerations. The notable balance in blood supply from both sources highlights the liver's dual roles in metabolism and detoxification.