Changes

==Structure==

==Structure==

*The descending duodenum passes out of the pylorus of the [[Forestomach - Anatomy & Physiology|stomach]] (on the right side of the abdomen) and has a sigmoid flexure. It passes towards the right abdominal wall and rises dorsally. In its passage it is related dorsally to the right lobe of the [[Pancreas - Anatomy & Physiology|pancreas]], ventrally to the [[Jejunum - Anatomy & Physiology|jejunum]] and medially to the ascending [[Colon - Anatomy & Physiology|colon]] and [[Caecum - Anatomy & Physiology|caecum]].  

*The descending duodenum passes out of the pylorus of the [[Forestomach - Anatomy & Physiology|stomach]] (on the right side of the abdomen) and has a sigmoid flexure. It passes towards the right abdominal wall and rises dorsally. In its passage it is related dorsally to the right lobe of the [[Pancreas - Anatomy & Physiology|pancreas]], ventrally to the [[Jejunum - Anatomy & Physiology|jejunum]] and medially to the ascending [[Colon - Anatomy & Physiology|colon]] and [[Caecum - Anatomy & Physiology|caecum]].  

**At a point between the right [[Kidney - Comparative Anatomy & Physiology|kidney]] and pelvic inlet it turns medially and cranially around the root of the mesentery to become the ascending duodenum. The point of turn is called the ''caudal flexure'' of the duodenum.

**At a point between the right [[Macroscopic Renal Anatomy - Anatomy & Physiology#Common Anatomy|kidney]] and pelvic inlet it turns medially and cranially around the root of the mesentery to become the ascending duodenum. The point of turn is called the ''caudal flexure'' of the duodenum.

**The ascending duodenum is shorter and bends ventrally to enter the mesentery and becomes the [[Jejunum - Anatomy & Physiology|jejunum]].

**The ascending duodenum is shorter and bends ventrally to enter the mesentery and becomes the [[Jejunum - Anatomy & Physiology|jejunum]].

*Mesoduodenum attaches the duodenum to the dorsal abdominal wall.  

*Mesoduodenum attaches the duodenum to the dorsal abdominal wall.