ANATOMY Flashcards
3 constrictions of oesophagus
and why important?
cervical
thoracic
diaphragmatic
important to pass bolus through oesophagus and into stomach
bile made where?
liver
role of gallbladder?
store and concentrate bile
where does cystic artery lie?
in triangle of calot
triangle of calot created by?
common hepatic duct, cystic duct and visceral surface of liver
foregut structures?
oesophagus, stomach to duodenum
midgut structures?
end part of duodenum to 2/3 of transverse colon
differences between jejunum and ileum?
ileum - pale pink, less vascularity, thin wall, more fat
jejunum - deeper red, thick wall, more vascularity, less fat
blood supply to midgut?
superior mesenteric artery
blood artery to foregut?
celiac trunk
hindgut structures?
end 1/3 of transverse colon to anus
blood supply to hindgut?
inferior mesenteric artery
teniae coli?
thick bands of smooth muscle - longitudinal layer
parasympathetic innervation of abdomen by? 2
vagus nerve
pelvic splanchnic nerves S2,S3,S4
sympathetic innervation of abdomen by?
abdominopelvic splanchnic nerves
prevertebral sympathetic ganglia
abdominal aortic plexus
portal vein formed by?
union of splenic vein and superior mesenteric vein
3 sites of porto-systemic anastomoses?
anorectal junction
gastroesophageal junction
umbilicus
lumbar nodes in what three groups and explain each
pre-aortic = drains organs supplied by anterior branches of aorta
lateral aortic = drains organs supplied by lateral aortic branches
retro-aortic = drains posterior abdominal wall
level of portal vein? and where
L2 - behind neck of pancreas
mucosa layers?
inner = epithelium
lamina propria
outer = muscular mucosa
muscalris externa layers?
inner = circular outer = longitudinal
how to know if serosa or adventitia?
serosa - below diaphragm
adventitia - above diaphragm
what is the submucosa?
dense irregular, connective tissue -
nerves, bv, lymphatics here
and sometimes glands
myenteric plexus controls?
contractions of two layered muscles - c and l
submucosal plexus controls?
local secretion, absorption etc
what is enteric nervous system?
guts own nervous system - independent control
abdominal cavity bound by what?
diaphragm, pelvic diaphragm, abdominal muscle walls
visceral membrane and parietal membrane?
visceral - covers organs
parietal - lines cavity
peritoneum is what?
double layer serous membrane
intraperitoneal organ meaning?
completely covered by visceral, invaginated into sac, mesentery involved
retroperitoneal organ meaning?
only partially covered by peritoneum on one surface, anterior side, no mesentery involved
mesentery?
double layer of peritoneum due to invagination of peritoneum by organ (project off posterior wall)
omentum?
double layered extension of peritoneum passing from stomach and duodenum to adjacent organs
greater omentum?
connect stomach to transverse colon
lesser omentum?
connect stomach/duodenum to liver
mesentery of trasnverse colon called?
transverse mesocolon
peritoneal cavity divided into?
greater and lesser sac
lesser sac of peritoneal cavity called?
omental bursa
how are the two sacs of the peritoneal cavity conncted?
by epiploic foramen
where is omental bursa to stomach?
posterior
boundaries of abdominal wall describe:
-posterior, anterior, superior, inferior
posterior - vertebrae column
anterior - abdominal muscular wall
superior - by xiphoid process, costal cartilage
inferior - inguinal ligament, pubic crest
umbilicus at what level?
T10 dermatome ?
belly butTEN
level of L3 vertebrae
LINEA alba?
midline band extending from xiphoid process to pubic symphysis
ileac crest level? and where
L4
extends posteriorly from anterior superior iliac spine
anterior superior iliac spine?
sticky out bit of hip
name 9 regions of abdomen?
right/left column - hypochondriac - lumbar - inguinal
middle column - epigastric - umbilical - hypogastric
regions formed by what planes?
2 midclavicular planes
subcostal horizontal plane - in line of 10th costal cartilage
trans tubercular horizontal plane - through L5 vertebrae
4 quadrants formed by?
trans umbilical plane - through umbilicus - horizontal
median plane -vertical
external oblique muscles explain direction? function?
innervation?
top to down - run inwards
superficial inferomedially
compress and support abdominal organs - flex and route trunk
innervation = thoraco-abdominal and subcostal nerves - anterior rami T7-T12 spinal
internal oblique muscles explain direction? function?
innervation?
top to down- run outwards
intermediate, inferomedially
compress and support abdominal organs flex and rotate trunk
thoracic-abdominal nerves T7-T11 spinal, subcostal nerves and 1st lumber nerve
order of abdominal muscles - out to in?
external SUPERFICIAL
intermediate
transversus abdomens INNERMOST
TRansversus abdominis? direction? function?
innervation?
horizontal
compress and support abdominal organs
thoracic-abdominal nerves - anterior rami of T7-T11 subcostal and 1st lumber nerve
rectus abdominis?direction? function?
long, broad strap like muscle - on front side
flexes trunk and compresses abdominal organs
thoracic-abdominal and subcostal nerves - T7-T12 spinal
what is enclosed by rectus sheath?
rectus abdominis
rectus sheath what is it?
formed by WHAT?
large area of connective tissue
apneourosis of 3 flat muscles - internal, external and transversus
rectus sheath contains what ?
what borders does it have?
anterior and posterior wall
contains - rectus abdominis, pyramadalis muscles, epigastric arteries, veins and lymph vessels
explain by changes of rectus sheath occurs mean?
from superior to inferior the contents of rectus sheath changes
superior to costal margin - only apneoursis of external oblique - no posterior wall
arcuate line?
marks transition between posterior rectus sheath covering superior 3/4 of rectus abdomens to just transversals fascia covering inferior 1/4
superior to arcuate line? anterior and posterior wall
upper 3/4
anterior wall = apneauorsis of external and internal oblique
posterior wall = apneuroisis of internal and transversus
inferior to arcuate line? anterior and posterior wall
anterior wall = all 3 muscles
posterior wall = in direct contact with transversals fascia
function of pyramidal muscle?
tenses linea alba
conjoint tendon what occurs here?
internal oblique and transversus abdominal join medially
what is transversals fascia?
thin membrane which lies between transverse abdominal muscle and parietal membrane
superior epigastric artery supplies what?branch off
what?
branch off Internal thoracic artery
supplies upper part of rectus abdominis muscle
inferior epigastric artery supplies what?branch off what?
branch off external iliac artery
supplies lower rectus abdominis
lymph drainage of abdomen?
veins superior to umbilicus = drain to axillary LN
veins inferior to umbilicus = drain to superficial inguinal lymph nodes