The mesoduodenum is relatively short, so the duodenum is closely tethered in a constant position. The descending duodenum is attached to the base of the [[Caecum - Anatomy & Physiology|caecum]]. The descending duodenum runs caudally beneath the [[Liver - Anatomy & Physiology|liver]] to the caudal pole of the right [[Urinary System - Anatomy & Physiology|kidney]] where it has it's caudal flexure to become the ascending duodenum.
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The mesoduodenum is relatively short, so the duodenum is closely tethered in a constant position. The descending duodenum is attached to the base of the [[Caecum - Anatomy & Physiology|caecum]]. The descending duodenum runs caudally beneath the [[Liver - Anatomy & Physiology|liver]] to the caudal pole of the right [[Urinary System Overview - Anatomy & Physiology|kidney]] where it has it's caudal flexure to become the ascending duodenum.