Blood Supply to Digestive Organs

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What is systemic circulation?
Blood supply to the organs
What do the arteries carry?
Oxygenated blood from the heart to the body
What do the veins carry?
Deoxygenated blood from the body to the heart
What are the 3 vessels of the aorta that supply the abdominal viscera?
-Celiac Trunk (Has 3 branches)
-Superior Mesenteric Artery
-Inferior Mesenteric Artery
-All are branches of the abdominal aorta
What does the celiac trunk supply blood to?
-The esophagus to the proximal 1/2 of duodenum and surrounding accessory organs
-Liver
-Pancreas
-Stomach
-Spleen
What does the superior mesenteric artery supply blood to?
-Distal 1/2 of duodenum to the proximal 2/3 of transverse colon
What does the inferior mesenteric artery supply blood to?
Distal 1/3 of transverse colon to the end of the colon anal canal
What is the hepatic portal system?
Venous system that delivers nutrient rich deoxygenated blood from the GI tract and other abdominal organs to the liver
What are the veins of the hepatic portal system?
-Superior mesenteric vein
-Inferior mesenteric vein
-Splenic vein
-Hepatic portal vein
What is the main vein that takes the blood to the liver?
Hepatic Portal Vein
What two systems does the liver receive blood from?
-Systemic circulation
-Hepatic Portal system
What vein drains the spleen and has a tributary, the inferior mesenteric vein (IMV), that drains the distal portion of large intestine?
Splenic vein
What vein drains the small intestine and proximal portion of large intestine?
Superior mesenteric vein
What vein drains into the large intestine?
Inferior mesenteric vein
What vein delivers blood into dilated capillaries (Liver Sinusoids) where nutrients are absorbed?
Hepatic portal vein
Blood leaves the liver and drains into the inferior vena cava and is transported to the heart via which veins?
Hepatic veins
What does the portal vein drain into? Where does it all go?
-Drains into the liver sinousoids
-Then to the hepatic veins
-Then to the Inferior Vena Cava
-Then into the heart
What two veins drain into the portal vein? (Main contributers)
-Superior Mesenteric Vein
-Splenic Vein
What is portal-systemic anastomosis?
-The communication in connection between the portal and systemic systems.
-Blood that comes in makes a stop in the liver before being sent out to the systemic circulation.
What is portal hypertension?
-The obstruction of venous return from the intestines to the heart via the liver.
-This will cause the communicating channels to open and divert blood back to the heart via systemic system.
-Leads to buildup of fluid in the abdomen.
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