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==Vasculature==
 
==Vasculature==
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*The cranial mesenteric artery supplies blood to the jejunum.
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*It is a branch of the aorta.
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*It branches greatly within the mesenty of the jejunum.
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**There are many anastomoses within the mesentry, which ensure that the intestine can survive even if a major division of the cranial mesenteric is damaged.
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*The cranial mesenteric vein drains blood from the jejunum and enters the portal vein.
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**It is rich in the products of digestion following a meal.
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**The portal vein enters the liver.
    
==Innervation==
 
==Innervation==
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