Now, the portal venous system comprises of the portal vein and its tributaries, namely the Splenic and Mesenteric veins.

门静脉系统由门静脉和其支流组成，包括脾静脉和肠系膜静脉。

The round ligament stay shut because pressures in the portal venous system and the systemic venous system are the same under 12 mmHg.

圆韧带保持关闭状态，这是因为门静脉系统里的血压和体静脉系统的血压都同样是低于12mmHg的。

Portal hypertension leads to the formation of Portosystemic shunts, which is when blood is diverted away from the portal venous system and backs up into the systemic veins.

门静脉高压症可导致门脉-体静脉系统分流的形成，即血液从门静脉系统转向分流，回到了体静脉系统。