<P> The first part , or superior part , of the duodenum is a continuation from the pylorus to transpyloric plane . It is superior to the rest of the segments , at the vertebral level of L1 . The duodenal bulb about 2 cm long , is the very first part of the duodenum and is slightly dilated . The duodenal bulb is a remnant of the mesoduodenum , a mesentery which suspend the organ from the posterior abdominal wall in fetal life . The first part of the duodenum is mobile , and connected to the liver by the hepatoduodenal ligament of the lesser omentum . The first part of the duodenum ends at the corner , the superior duodenal flexure . </P>
<P> The first part , or superior part , of the duodenum is a continuation from the pylorus to transpyloric plane . It is superior to the rest of the segments , at the vertebral level of L1 . The duodenal bulb about 2 cm long , is the very first part of the duodenum and is slightly dilated . The duodenal bulb is a remnant of the mesoduodenum , a mesentery which suspend the organ from the posterior abdominal wall in fetal life . The first part of the duodenum is mobile , and connected to the liver by the hepatoduodenal ligament of the lesser omentum . The first part of the duodenum ends at the corner , the superior duodenal flexure . </P>
what portion of the duodenum includes the duodenal bulb
what portion of the duodenum includes the duodenal bulb
The first part , or superior part
The first part , or superior part