what portion of the duodenum includes the duodenal bulb
Duodenum 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 2Â 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.[9] 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.[8]:273