Living anatomy - anterior abdominal wall Flashcards
what makes up the costal margin
7-10th costal cartilages
what structures border the top of the abdominal cavity
diploid process
7-10th costal cartilages
11th and 12th floating ribs
what structures border the lower abdominal region
iliac crest
anterior superior iliac spine (ASIS)
pubic tubercle
why is it useful to be able to find the pubic tubercle
approximate location for deep ring of inguinal canal (common place for hernias)
between pubic tubercle and ASIS
What is the linea alba
midline vertical line
meeting point for aponeuroses (tendonous sheets) of all flat muscles of anterior abdominal wall
what is the rectus abdominis
vertical muscles either side of midline
tendinous intersections = six pack lines to stop muscle bowing
what is the linea semilunaris
lateral border of the rectus abdominus muscle extending from the pubic tubercle upward to intersect the costal cartilage at the tip of the 9th costal cartilage.
what are the other muscles of the anterior abdominal wall
transversus abdominus
internal and external oblique
what is the arcuate line
internal oblique and transversus abdominis aporneuroses pass anteriorly to rectus abdominis
form rectal sheath (still in front at bottom)
what is the 4 region division
RUQ
LUQ
RLQ
LLQ
What is the 9 region division
RHR EGR LHR
RLR UR LLR
RIR HGR LIR
divided by R and L midclavicular lines, transpyloric plane and transtubercular plane
where is the transpyloric plane
between the suprasternal notch and the pubic symphysis
passes through body of the first lumbar vertebra posteriorly and through the costal margin at the tip of the 9th costal margin anteriorly
where is the transtubecular plane
around the trunk at the level of the iliac tubercles, on the iliac crests.
extend line posteriorly it would cross the vertebral column at the level of L5 vertebra.
where is McBurney’s point
in RLQ
1/3 way from ASIS to umbilicus
what is an aporneuroses
flat tendon
what directions do the muscles of the anterior abdominal wall move
EO - anteriorly medially inferiorly (hands in pockets)
IO A M superiorly
TA anteriorly and medially (transversely)
what structures make up the walls of the inguinal canal
roof- fibres of IO TA and aponeurosis inc conjoint tendon
anterior - aponeurosis of EO
floor- inguinal ligament
Posterior- transversalis muscle
which parts of the digestive tract are suspended by a mesentery
stomach, SI and transverse colon
what structure connects the greater curvature of the stomach to the transverse colon
greater omentum, four layers of peritoneum
how many lobes in the liver
4
left right caudate quadrate
where do the renal arteries arise and drain
aorta at L1/2 and IVC at L1/2
how do the lengths of the renal arteries compare
aorta slightly left of midline so right renal artery is longer
left renal vein has to travel over aorta so is longer to reach IVC from kidney
