The Portal Vein is formed by the junction of which two veins?

The Portal Vein is indeed formed by the junction of the Superior Mesenteric vein and the Splenic vein. This anatomical feature is crucial to the venous drainage system of the gastrointestinal tract. The Superior Mesenteric vein collects blood from the small intestine and parts of the large intestine, while the Splenic vein drains blood from the spleen, pancreas, and portions of the stomach. When these two veins converge, they create the Portal Vein, which transports nutrient-rich blood to the liver for processing.

Understanding this connection is essential for comprehending how blood flow and nutrient absorption from the digestive system are managed and how the liver plays a vital role in filtering this blood before it re-enters the systemic circulation. The other options do not reflect the correct anatomical relationships of the veins involved in forming the Portal Vein, as they do not connect to the hepatic portal circulation necessary for liver function.