Jejunum and ileum

Anatomy · Abdomen & pelvis anatomy

Jejunum & Ileum Key Points

Intraperitoneal
jejunum and ileum each approximately 3m long
jejunum and ileum continuous with one another

Blood Supply

Arterial supply: superior mesenteric artery
Venous drainage: via jejunal veins to the superior mesenteric vein

Innervation

Pain fibres from T9/10 and pain referred to T9/10 dermatome (level of umbilicus) as a result
Parasympathetic supply from mesenteric plexus


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