4 types vessels of liver Blood supply of liver: 1.proper hepatic artery(←hepatic A←celiac trunk←aorta) 2.hepatic portal vein A dual BLOOD supply:the portal vein supply for75%(dominant), The arterial supply account for 25%(lesser) Hepatic v. Sublobular vei Sublobular veins Portal triads Hepatic artery proper Hepatic portal vein ptisnand bie duct Common bile duct
• Blood supply of liver: 1. proper hepatic artery( ← hepatic A← celiac trunk ← aorta) 2. hepatic portal vein A dual BLOOD supply: the portal vein supply for75%(dominant) , The arterial supply account for 25%(lesser) 4 types vessels of liver
1.Proper hepatic artery Celiac trunk→common hepatic A→proper hepatic A>right left branches
1. Proper hepatic artery Celiac trunk → common hepatic A →proper hepatic A → right & left branches →
2.Hepatic portal vein General features the union of superior mesenteric vein SMV and splenic vein passing through the lesser omentum to the porta hepatis,divides into right and left branches Has no valves in hepatic portal system Drains blood from GI tract(capillaries) to hepatic sinusoid(capillaries):the lower end of esophagus to the upper end of anal canal,pancreas,gall bladder, bile ducts and spleen
2. Hepatic portal vein General features • the union of superior mesenteric vein SMV and splenic vein • passing through the lesser omentum to the porta hepatis, divides into right and left branches • Has no valves in hepatic portal system • Drains blood from GI tract(capillaries) to hepatic sinusoid(capillaries) : the lower end of esophagus to the upper end of anal canal, pancreas, gall bladder, bile ducts and spleen
2.Hepatic portal vein Tributaries of hepatic portal v. 1.Superior mesenteric v.SMV 2.Inferior mesenteric v.IMV 3.Splenic v. 4.Left gastricv. 5.Right gastric v. 6.Cystic v. 7.Paraumbilical v
2. Hepatic portal vein Tributaries of hepatic portal v. 1. Superior mesenteric v. SMV 2. Inferior mesenteric v. IMV 3. Splenic v. 4. Left gastric v. 5. Right gastric v. 6. Cystic v. 7. Paraumbilical v
Portal-Caval venous anastomoses 1.Site at the esophagus left gastric vein→esophageal venous plexus→ esophageal vein>hemiazygos vein superior vena cava Esophageal varices,---bleeding 2.At rectum splenic vein>inferior mesenteric vein>superior rectal vein>rectal venous plexus>inferior rectal and anal veins>internal iliac vein>inferior vena cava Hemorroid ---Hemorrage Portal hypertension
Portal- Caval venous anastomoses 1. Site at the esophagus left gastric vein → esophageal venous plexus → esophageal vein → hemiazygos vein → superior vena cava Esophageal varices,---bleeding 2. At rectum splenic vein → inferior mesenteric vein → superior rectal vein → rectal venous plexus→ inferior rectal and anal veins → internal iliac vein → inferior vena cava • Hemorroid --- Hemorrage Portal hypertension