Peritoneum and peritoneal reflections anatomy Flashcards
what are the paired muscles of the anterolateral abdominal wall
external/internal oblique transversus abdominus rectus abdominus (quadratus lumborum posteriorly)
what are the boarders of the abdominal cavity
superior limit - thoracic diaphragm
inferiorly - continuous with pelvic cavity
anteriorly and laterally - abdominal muscles
posterior - lumber vertebrae
what is one reason why pelvic cavity must be continuous with abdominal cavity
gonads start in the abdomen and lower into pelvic cavity
where does the abdominal cavity technically start
anything deep of the anterolateral muscles
where does the foregut start and end
oesophagus (distal end) to the middle of the duodenum
where does the mid gut start and end
middle duodenum to 2/3rds transverse colon
where does the hindgut start and end
2/3rds transverses colon to anus
what is the linear alba
midline of the fusion of aponeurosis of the rectus sheath
what is a mesentery
double layer of peritoneum which suspends parts of organs
define parietal peritoneum
layer of peritoneum lining the abdominal wall, pelvic wall and inferior surface of the diaphragm
define visceral peritoneum
layer of peritoneum that specifically covers viscera
what is the difference between retroperitoneal and intraperitoneal
retro - situated outside the peritoneum and in contact with the body wall eg kidneys
intra - suspended from the abdominal wall by a double layered fold of peritoneum
what is the function of a mesentery
route for nerves blood vessels and lymphatics
what is the general rule of structures that are within mesenteries
structures that change in size and shape such as the stomach are intraperitoneal
what is the role of the dorsal mesentery
separates gut tube from body wall allowing it to grow longer than the body
it is dorsal due to the aorta, IVC, spinal cord, symp chain
what is within the mesentery of the small intestine
what are the attachments
jejunum and ileum
attached from upper left to lower right posterior abdominal wall
what is within the transverse mesocolon
transverses colon which is horizontally across the posterior abdominal wall
what does the mesocolic shelf separate
the peritoneal cavity into suprcolic and infra colic compartments
what are secondarily retroperitoneal
ascending and descending colon
what are the grooves called in the ascending and descending colon
parabolic gutters
what is the greater sac divided into
main peritoneal cavity subdivided into supracolic and infra colic compartments
what is within the lesser sac
recess of peritoneal cavity between stomach and posterior abdominal wall
what links the greater and lesser sacs together
epiploic foramen of winslow
what are the foregut, mid and hid connected to the posterior abdominal wall by
dorsal mesentery
describe the lateral view of the foregut and ventral mesentery
check folder for diagram
what is in the ventral mesentery
foregut only - free lower border midway along duodenum
where do they liver and spleen develop
spleen in dorsal mesentery
liver in ventral mesentery
during development what are these connected to lienorenal ligament gastrosplenic ligament Leser omentum falciform ligament
connects dorsal aspect to spleen
connects spleen and stomach
connects stomach and liver
connect liver to ventral aspect
how is the greater momentum formed during development
stomach rotates 90 degrees to the right, dorsal mesentery balloons to the left
as the stomach rotates to the right what else moves
liver is pushed to the right and speed is pushed to the left
what features are in the supra colic compartment
Falciform ligament Subphrenic recess Coronary ligaments Hepatorenal recess (Morrison’s recess) Lesser omentum Epiploic foramen Gastrosplenic ligament Lienorenal ligament
what features are in the infra colic compartment
parabolic gutters and the mesentery
