pacl Flashcards
What is superiorly related to the third part of the duodenum?
The inferior border of the head of the pancreas is in contact with the third part of the duodenum.
How long is the fourth part of the duodenum?
The fourth part of the duodenum is 1 inch long.
How does the fourth part of the duodenum course?
It turns obliquely upward on the left psoas muscle and ends about 2.5 cm (1 inch) to the left of the midline, bending sharply forward to form the duodenojejunal flexure.
What is the posterior relation of the fourth part of the duodenum?
The fourth part of the duodenum is related to the left margin of the aorta posteriorly.
What is to the right of the fourth part of the duodenum?
The lumbar vertebral column is to the right of the fourth part of the duodenum.
What is anteriorly and to the left of the fourth part of the duodenum?
The coils of the jejunum are anteriorly and to the left of the fourth part of the duodenum.
What fixes the duodenojejunal flexure in its position?
The duodenojejunal flexure is fixed by a peritoneal fold (ligament of Treitz), which is attached to the right crus of the diaphragm.
How long are the jejunum and ileum together?
The jejunum and ileum together measure about 20 feet (6 m) long.
What proportion of the small intestine is the jejunum?
The jejunum makes up the upper two-fifths (2/5) of the small intestine.
What proportion of the small intestine is the ileum?
The ileum makes up the lower three-fifths (3/5) of the small intestine.
