Four ramus communicans betweenportal and systemic circulations
◆ Four ramus communicans between portal and systemic circulations
1.Coronary vein of stomach short gastric veins →Esophageal and gastric ramus communicans -→ Azygos vein、hemiazygos vein -→ Superiorvena cavaEsophageal and gastricramuscommunicans
1.Coronary vein of stomach、short gastric veins → Esophageal and gastric ramus communicans → Azygos vein、 hemiazygos vein → Superior vena cava Esophageal and gastric ramus communicans
2.Inferior mesenteric vein, superior rectal vein→ The lower rectal anal canal ramus communicans Inferior rectal vein, anal canal vein →Inferiorvena cavaThe lower rectalanalcanalramuscommunicans
2.Inferior mesenteric vein,superior rectal vein → The lower rectal anal canal ramus communicans → Inferior rectal vein, anal canal vein → Inferior vena cava The lower rectal anal canal ramus communicans
3.Paraumbilical vein → Anterior abdominal wallramus communicans → Waist deep vein -→ Superiorvena cava, under deep vein → Inferior vena cavaAnteriorabdominawallramus communicans
3.Paraumbilical vein → Anterior abdominal wall ramus communicans → Waist deep vein → Superior vena cava, under deep vein → Inferior vena cava Anterior abdominal wall ramus communicans
4.Branches of the superior and inferior mesenteric vein -Retroperitoneal ramus communicans - Inferior vena cavaRetroperitonealramuscommunicans
4.Branches of the superior and inferior mesenteric vein → Retroperitoneal ramus communicans → Inferior vena cava Retroperitoneal ramus communicans