Venous drainage of liver into IVC is through:
**Core Concept**
The liver's venous drainage is a complex process that involves the hepatic veins, which ultimately drain into the inferior vena cava (IVC). This process is crucial for the removal of deoxygenated blood from the liver and its return to the heart.
**Why the Correct Answer is Right**
The hepatic veins are responsible for draining blood from the liver into the IVC. These veins are formed by the confluence of small hepatic veins that arise from the liver sinusoids. The hepatic veins then merge to form the left, middle, and right hepatic veins, which ultimately drain into the IVC. This process ensures that deoxygenated blood from the liver is returned to the heart for re-oxygenation.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because it does not specify a correct vein or location for venous drainage of the liver.
* **Option B:** This option is incorrect because it does not accurately describe the hepatic venous system that drains into the IVC.
* **Option D:** This option is incorrect because it is not a recognized vein involved in the venous drainage of the liver into the IVC.
**Clinical Pearl / High-Yield Fact**
The hepatic veins are a critical component of the liver's venous drainage system, and their obstruction can lead to severe consequences, including liver failure and portal hypertension.
**Correct Answer: C. Hepatic veins.