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266 Cards in this Set

  • Front
  • Back
what do all abdominal muscles do?
compress abdominal contents

- and all except for TA flex the trunk
rectus sheath is formed by:
aponeuroses of external Ob, internal Ob, and TA
the anterior layer of the rectus sheath covers:
the entire anterior of RA
the posterior layer of the rectus sheath covers how much of the posterior of RA?
3/4's
what is the arcuate line?
the line at which half of the internal oblique and all of the TA tendons cross from posterior to anterior
the arcuate line delineates where:
the posterior sheath is no longer found
above the arcuate line, which tendons are where?
all of the external oblique and half of the internal oblique tendons are in front of RA,

the other half of internal oblique, and all of TA tendons, are behind RA

(below the arcuate line, ALL tendons are in front of RA)
where does the superior epigastric artery anatomose with the inferior epigastric?
around the arcuate line
what is the inguinal ligament formed by?
the lower border of the ext. Ob. aponeurosis
the inguinal ligaments runs from:
ASIS to pubic tubercle
when do the gonads descend?
in week 7 of embryo
what is descent of the gonads?
when gonads push through abdominal layers to descend, creating the inguinal canal
3 facets of gonadal descent:
1. gonads push through processus vaginalis (peritoneal outpocketing)

2. gonads are guided by the gabernaculum (CT)

3. take 3 abdominal layers with them
what 3 abdominal layers do the gonads take with them as they descend?
external ob. aponeurosis, internal ob. aponeurosis, and transversalis fascia
**which abdominal layer do gonads NOT take with them in their descent?**
TA aponeurosis
gonads for males = testes; apart from the abdominal layers, they bring:

(3)
vessels, ducts, and nerves with them, forming the spermatic cord
round ligament of uterus =
remnant of gabernaculum
border of inguinal canal: anterior wall =
aponeurosis of external oblique
border of inguinal canal: floor =
inguinal ligament
border of inguinal canal: posterior wall =
transversalis fascia
border of inguinal canal: roof =

(2)
aponeuroses of internal oblique and TA
what is the conjoint tendon?
the combined insertion of internal oblique and TA
what does the conjoint tendon do?
reinforces the medial posterior wall of the inguinal canal
what's another name for the conjoint tendon?
inguinal falx
which structures are found in the inguinal canal, in males?

(2)
1. spermatic cord

2. ilioinguinal nerve
what structures are found within the spermatic cord?

(6)
1. **genital branch** of genitofemoral nerve

2. cremasteric artery and vein

3. ductus vas deferens

4. artery to DVD

5. testicular artery

6. pampiniform venous plexus
**what's so great about the pampiniform venous plexus?**
it surrounds the testicular artery, cooling the blood coming to the sperm, so that they can survive
external spermatic fascia:

(2)
1. arises from aponeurosis of ext ob.

2. attaches to superficial ring
cremasteric fascia:

(2)
1. arises from aponeurosis of internal ob.

2. middle layer
cremaster muscle action =
retracts testis when necessary
internal spermatic fascia:

(2)
1. arises from ***transversalis fascia***

2. attaches to deep ring
hydrocele =
presence of peritoneal fluid near testis
3 facts about hydrocele:
1. not uncommon in newborns

2. typically self-corrects within a year

3. may occur in adults
ilioinguinal nerve:

(2)
1. innervates and pierces internal obliques and TA

2. enters inguinal canal, **bypassing deep ring**
genitofemoral nerve:

(3)
1. genital branch **enters deep ring**

2. innervates cremaster

3. femoral branch innervates skin
**what do the ilioinguinal nerve and genitofemoral nerve have in common, regarding the inguinal canal?
both pass through the superficial ring
**the falciform ligament and ligamentum teres hepatis do NOT:
connect bone to bone
***indirect hernias:***

(5)
1. congenital

2. ~ deep ring

3. most common, for both genders

4. enters scrotum

5. **found lateral to epigastric vessels**
***direct hernias:***

(3)
1. ~ weak area of post. wall of inguinal canal

2. enclosed in sac by transversalis fascia

3. found Medial to epigastric vessels
hernias are reducible if:
contents can be returned to normal position
hernias are called strangulated if:
blood supply to contents is compromised
Richter's hernia ~
strangulation without intestinal obstruction
external hernia = hernia that:
protrudes through all layers of abdominal wall
hernias are extremely common and prevalence increases with:
age
*vast majority of hernias occurs in:
the inguinal region
majority (66%) of inguinal hernias are:
*in*direct
men are much more likely to have:
an inguinal hernia

than women
abdominal hernias tend to occur at sites where:
there is no striated muscle
femoral hernias are more common in:
women

- though most women get indirect hernias
while contents of hernia may be large,
hole/rupture may be small.
mesentery =
visceral peritoneum that **connects** visceral and parietal peritoneum
2 features of abdominal mesenteries:
1. **reflect off body wall**

2. provide path for **blood vessels to organs** (in between)
parietal peritoneum:

(2)
1. covers body wall

2. innervated by general sensory => sharp pain
visceral peritoneum:

(2)
1. shrink-wrapped onto organs

2. innervated by VSN => dull pain/fullness
intraperitoneal organs: definition and examples
organs found almost completely **inside** visceral peritoneum

- e.g. liver, stomach, spleen, part of duodenum, jejunum, ileum
retroperitoneal organs =
organs OUTSIDE of and behind parietal peritoneum
secondarily retroperitoneal organs =
those that, during development, come into contact with body wall and go from intraperitoneal to being covered by the parietal peritoneum
peritonitis =
inflammation of the peritoneum
peritonitis =>
ascites
ascites =
excess fluid in the **peritoneal cavity**
what causes peritonitis?

(2)
1. trauma

2. infection
how is ascites fixed?
*paracentesis*

(drainage)
greater omentum =
4 layers of peritoneum invested with fat
greater omentum facets:

(3)
1. suspended from greater curvature

2. provides protection from infection and pathway for neurovasculature

3. can wrap around inflamed organs to prevent peritonitis
lesser omentum =
reflection of peritoneum (2 layers)
lesser omentum facets:

(2)
1. attaches lesser curvature and duodenum to liver

2. provides a path for neurovasculature
what are the 2 parts of the lesser omentum?
1. hepatogastric ligament (main part)

2. hepatoduodenal ligament
most of the peritoneal cavity is called the:
greater sac
the greater sac is composed of 5 parts:
1. supracolic compartment

2. infracolic compartment

3. subphrenic recess (right only)

4. ***subhepatic recess / Morrison's pouch (right only)***

5. paracolic recesses (gutters on both sides)
the lesser sac is also called the
omental bursa
where is the lesser sac found?
behind the liver, lesser omentum, and stomach
what are the 3 recesses of the lesser sac?
1. superior

2. splenic

3. inferior
***through what do the greater and lesser sacs communicate?***
***the omental foramen / epiploic foramen of Winslow***
boundaries of epiploic foramen of Winslow / omental foramen =

(4)
liver, 1st part of duodenum, hepatoduodenal ligament, and IVC
**the omental foramen is the site of:
Pringle's maneuver
Pringle's maneuver during liver bleeding =
clamp the hepatoduodenal ligament behind the lesser omentum
what artery does Pringle's maneuver interrupt?
the common hepatic artery
if bleeding continues despite Pringle's maneuver, it means:
veins of the liver are damaged

(aka outflow)
fluid may abnormally accumulate in the:
lesser sac
where is the portal triad found?
***within*** the hepatoduodenal ligament
what is the portal triad composed of?
1. common bile duct

2. portal vein

3. proper hepatic artery
roots of mesenteries =
attachments to body wall
*** but "root of mesentery" = ***
attachment to body wall of the mesentery of the small intestine
peritoneal ligaments connect:
organ to organ
peritoneal ligaments are double layers of peritoneum, and are a specific *type* of
mesentery
*** "lieno" =
spleen
examples of peritoneal ligaments:

(2)
1. falciform - connects liver to abdominal wall

2. coronary ligament - connects liver to diaphragm, covers bare area of liver
a 3rd way to use "ligament" =
as embryologic remnant

e.g. ligamentum teres hepatis or ligamentum venosum (remnant of ductus venosus)
blood supply to abdomen:

(3)
1. celiac trunk

2. superior mesentery artery

3. inferior mesentery artery
celiac trunk:

(3)
1. comes off aorta, just below diaphragm

2. ~ T12

3. supplies foregut
foregut =
esophagus to 1st part of duodenum

(includes, liver, pancrease, gallbladder)
3 branches of Celiac trunk:
1. common hepatic artery

2. splenic artery

3. left gastric artery
common hepatic artery =>

(3)
1. proper hepatic

2. right gastric

3. gastroduodenal
common hepatic artery supplies:

(5)
1. liver 2. gallbladder 3. stomach 4. pancreas 5. some duodenum
splenic artery (torturous/winding) supplies:

(2)
1. spleen

2. greater curvature
left gastric artery (smallest) supplies:

(2)
1. lesser curvature

2. distal esophagus
superior mesenteric artery:

(3)
1. off aorta, behind pancreas

2. ~ L1

3. supplies midgut
midgut =
rest of duodenum to part of transverse colon
inferior mesenteric artery:

(3)
1. off distal aorta

2. ~ L3

3. supplies hindgut
hindgut =
rest of transverse colon to proximal rectum
***if the inferior mesentery is occluded, the colon is still supplied by:
the superior mesentery, via the ***merginal artery of the colon***
**another name for marginal artery of the colon = **
artery of Drummond
technically, there's only ______________ in the peritoneal cavity
serous fluid
FAST scan =
Focused Assessment with Sinography for Trauma
liver doesn't hold sutures well;
stuff it with greater omentum
***how are the fore, mid, and hindgut formed?***
via **body folding of the endoderm**

collectively, they are called the primitive gut
collectively, the fore, mid, and hindgut are called:
the primitive gut
the foregut terminates at:
the oropharyngeal membrane
the hindgut terminates at:
the cloacal membrane
what forms the parietal peritoneum?
somatic LPM
what forms the visceral peritoneum?
splanchnic LPM
retroperitoneal organs =
organs that lie against the posterior body wall, covered by the parietal peritoneum on the anterior side
ventral mesentery grows out of:
the septum transversum
***what does the liver grow out of?***
***the ventral mesentery,*** dividing it into 2 parts
the 2 parts that the liver divides the ventral mesentery into:
1. lesser omentum (posteriorly)

2. falciform ligament
the falciform ligament contains the:
umbilical vein
what forms the muscular wall of the esophagus?
the splanchnic LPM
what does rotation of the stomach do?
pulls the dorsal mesentery to create the **greater omentum**
another name for dorsal mesentery =
dorsal mesogastrium
where do the spleen and pancreas form?
**within the dorsal mesentery**
the pancreas is a:
secondary retroperitoneal organ
what connects the spleen to the body wall?
the lienorenal ligament
what forms the pancreas?
the dorsal and ventral buds of the duodenum
how does Annular Pancreas come about?
the ventral pancreatic bud bifurcates
annular pancreas =>
duodenum encircled by pancreatic tissue => constriction => obstuction
what is the duodenum derived from?
both the foregut and the midgut
the lumen of the duodenum is initially:
destroyed, then *recanalized*
**incomplete recanalization** =>
stenosis of the duodenum
**absent recanalization =>
duodenal atresia
abnormal recanalizations also occur in:

(3)
1. esophagus

2. jejunum

2. ileum
**pyloric atresia/stenosis is a result of:
hypertrophy, NOT abnormal recanalization
what forms the midgut?
the primary intestinal loop
***physiological umbilical herniation = ***
intestinal loops protruding into extraembryonic cavity, within the umbilicus
***as the embryo grows, umbilical herniation is:***
reversed - intestines get pulled back in
**omphocele =
failure of intestines within umbilicus to retract
**gastroschisis =
intestines straight-up outside the body, in contact with air

- NOT within umbilicus
the hindgut and allantois are separated by:
the urorectal septum
***what two canals does the urorectal septum produce?***
1. urogenital sinus

2. anorectal canal

- the cloacal membrane ruptures, forming a different hole for each tube
***Hirschsprung disease =
congenital megacolon due to absence of parasympathetic ganglia in bowel wall

- no peristalsis => waste blockage
(parasympathetic ganglia are derived from:
the neural crest
somatic innervation targets:

(4)
1. muscle

2. skin

3. joints

4. tendons
visceral innervation targets:
1. mucous membranes

2. glands

3. SM

4. cardiac muscle
only VMN's are a:
two-neuron system
the sympathetic (visceral) system:

(4)
1. location of preganglionic bodies = ***T1-L2**

2. location of synapse = paravertebral or prevertebral ganglia

3. postsynaptic NT = NORI (except sweat glands)

4. **short** preganglionic axons
the parasympathetic system:

(4)
1. craniosacral

2. location of synapse = wall of organ

3. postsynaptic NT = ACH

4. LONG preganglionic axons
***splanchnic nerves come off of:***
sympathetic chains
***some preganglionic fibers enter the splanchnic nerve and travel within it to:***
synapse on a **prevertebral ganglion**

(i.e. NOT in sympathetic chain)
***some preganglionic fibers synapse in the sympathetic chain; then, POSTganglionic fibers travel through:***
splanchnic nerves to reach their targets
***2 ways of using splanchnic nerves:***
1. preganglionic neurons travel through them to synapse on prevertebral ganglia

2. postganglionic neurons travel through them to innervate their target
***sympathetic innervation of the heart AND lungs comes from:***
T1-T4
***what does the vagus nerve provide parasympathetic innervation of?***

(5)
1. heart

2. lungs

3. foregut

4. midgut

5. kidneys
VSN's paralleling sympathetic VMN's convery:
pain
VSN's paralleling parasympathetic VMN's convery:
reflexes/status
a celiac ganglion (solar plexus) block controls:
pain in patients with inoperable abdominal tumors
***sympathetic innervation of the midgut and kidney comes from:***
T10 and T11
**sympathetic innervation of the hindgut comes from:**
L1 and L2
***what provides parasympathetic innervation to the hindgut?***
S2-S4

- too far away for the vagus
****what's so special about the suprarenal gland?****
it's supplied directly by a sympathetic, preganglionic neuron

- NO postganglionic, NO parasympathetic innervation

=> NOREPI from preganglionic turns in on, no NOREPI from preganglionic shuts it down
5 sympathetic responses:
1. dec. salivation

2. dec. tears

3. dec peristalsis

4. release of EPI

5. inc. sweating
***referred pain: visceral pain is perceived as:
somatic in origin,

as if it originated from skin or body wall
referred pain: the same spinal segments innervate the skin as:
innervate the organs that are hurt

(remember the diaphragm example)
visceral pain is:
dull and hard to pinpoint
****preganglionic fibers that innervate the thorax synapse at:****
the sympathetic chain
****preganglionic fibers that innervate the abdomen synapse at:****
a prevertebral ganglia
***splanchnic nerves with SC names are:***
**sympathetic**
pelvic splanchnic nerves are:
**parasympathetic**
parasympathetic nerves originate in:

(2)
1. the BS

2. S2-S4
malrotation is a:
pediatric surgical emergency.
surgical exploration is necessary
***hallmark of malrotation =
biliary (green) emesis

- with atypical midgut volvus
volvus =
torsion of the intestines => obstruction
most vessels of the embryo form via:
vasculogenesis
some vessels form via:
angiogenesis
in angiogenesis, existing vessels:
fuse
all blood vessels come from:
splanchnic LPM

- form around the yoke sac
vitelline vessels:

(3)
1. temporary - get replaced by umbilical vessels

2. heart forms as their continuation

3. also make the paired dorsal aortae and cardinal veins
umbilical arteries branch out of the ____________ and travel to ___________
dorsal aortae;

the placenta

- **oxygenated** umbilical veins return to the embryo
eventually, umbilical and vitrelline vessels are bundled in the:
umbilicus
what does the aortic sac come off of?
the developing heart
***what does the aortic sac give off?
**5 pairs of arched branches** that feed into the dorsal aortae
***the dorsal aortae converge to form the:
aorta proper
***arches 1-3 + dorsal aortae form the:
**carotid arteries** and their branches
***the LEFT 4th arch forms the:***
**aortic arch**
the right 4th arch becomes:
the right subclavian
***both 6th arches form the:***
pulmonary **arteries**
what side is the ductus arteriosus found on?
left side
what does the ductus arteriosus do?
**shunts blood from the pulmonary trunk to the aorta,**

- thereby **bypassing lungs until birth**
what does the ductus arteriosus become?
the ligamentum arteriosus
PDA =>
extra blood in systemic circulation

(~rubella)
***the vitelline arterial plexus is remodeled into:***

(3)
celiac trunk, SMA, and IMA
***vitelline veins form:***
the **portal vein**
what happens to the right umbilical vein?
it degenerates
the left umbilical vein closes after birth and becomes the:
ligamentum teres hepatis
ductus venosus:

(2)
1. shunts blood to bypass liver

2. closes after birth, becoming lig. venosum
***in total, the aortic arches become:***

(4)
1. carotid arteries

2. aortic arch

3. pulmonary arteries

4. ductus arteriosus
***cardinal veins become the:***

(2)
SVC and IVC
***the left umbilical vein brings blood back from:***
the placenta
stomach:

(3)
1. cardiac sphincter ~ esophagus

2. angular incisure = tiny cave near pyloric sphincter

3. pyloric antrum = cave
"carcinoma" =
tumor from ecto or endoderm
"sarcoma" =
tumor from mesoderm
"adeno" ~
glandular
adenocarcinoma of the stomach =
malignant tumor of epithelium
adenocarcinoma of the stomach ~

(2)
1. more common after age 50

2. ~ aggressive spread to adjacent organs
the 1st part of the duodenum is:
intraperitoneal

- the rest is retroperitoneal
1st part of duo:

(4)
1. superior

2. has duo cap

3. most duo ulcers occur here

4. ~ L1
2nd part of duo:

(3)
1. descending

2. contains major and minor papillae

3. ~ L2-L3
**major papilla = opening of:**

(2)
common bile duct and main pancreatic duct
3rd part of duo:

(4)
1. inferior/transverse

2. crosses aorta and IVC

3. SMA and SMV run OVER it

4. ~ L3
4th part of duo:

(2)
1. ascending

2. ~ L2
**ligament of Treitz:**

(2)
1. *skeletal* muscle off of diaphragm

2. suspends duodenojejunal flexure
jejunum:

(2)
1. supplied by LONG vasa recta

2. mostly in LUQ
ileum:

(2)
1. supplied by SHORT vasa recta, but has many more arterial arcades

2. ends in iliocecal sphincter
diverticula =
pouches of intestines
cecum =
first part of colon
ascending and descending parts of colon are:
retroperitoneal
***what's the significance of being 2/3's of the way across the transverse colon?***

(3)
1. division of midgut and hindgut

2. place where parasympathetic innervation switches from vagus nerve to S2-S4

3. blood supply changes from SMA to IMA
adenocarcinomas of the colon:

(3)
1. ~ *descending* colon

2. in one's 60's

3. apple-core appearance
the gallbladder is:
hollow
porta hepatis = door of liver =

(2)
1. point of entry for **hepatic arteries and portal vein**

2. point of exit for hepatic ducts
cirrhosis of the liver =>
disorganized structure, scarring and nodules
main effect of cirrhosis of liver =
blood rerouted from portal system to IVC via anastomoses
hemorrhoids =
abnormally-enlarged veins
varices =
tortuous/knotted veins
2 conditions out of cirrhosis:
1. esophageal varices

2. caput medusae
esophageal varices =>
easy bleeding/coughing up blood

- deadly
**unneeded bile is stored in:**
the gallbladder;

actually travels back up the common bile duct
cholecystitis =
acute inflammation of gallbladder
cholecystitis is complicated by:
gallstones
cholelithiasis =
gallstones
cholelithiasis:

(2)
1. higher in women

2. associated with obesity and multiple pregnancies
the pancreas is mostly:
retroperitoneal
the pancreatic duct joins the common bile duct at:
the hepatopancreatic ampulla
uncinate of the pancreas =
hook-like part near head of pancreas
***blood supply to pancreas = ***

(2)
1. celiac from above

2. SMA from below
carcinoma of pancreas:

(4)
1. at head of pancreas

2. esp. in smokers

3. **obstructs bile duct** => jaundice

4. dead within a year
hepatic portal system =
venous drainage of spleen, pancreas, gallbladder, and abdominal GI tract
what does the portal system do?
**takes nutrient-rich blood to liver**

- NOT O2
***portal vein = ***

(3)
splenic vein + SMV

(IMV goes into splenic)
***the portal and systemic venous circulation share:***
small anastomoses
obstruction of liver =>
blood shunted to IVC

- **bypasses liver**
***overuse of small anastomoses =>
inflammation => internal hemorrhoids
lymph drainage of GI tract =

(3)
celiac, superior mesentery, and inferior mesentery nodes
ductus venosus:

(2)
1. bypassed liver

2. becomes ligamentum venosum after birth
umbilical vein becomes:
ligamentum teres hepatis
ductus arteriosus bypasses:
the lungs
which arteries supply the inferior of the diaphragm?
the inferior phrenic arteries
****structures passing through diapragm:****

(3)
1. IVC / right phrenic nerve (T8)

2. Esophagus / ant. and post. vagal trunks (T10)

3. Aorta / thoracic duct / azygos vein (T12)
kidneys:

(4)
1. located T12-L3

2. around ribs 11 and 12

3. right kidney is lower

4. retroperitoneal
layers of kidneys: outside =>
pararenal fat => renal fascia => perirenal fat covering kidneys
polycystic kidney disease:

(3)
1. replacement of renal tissue with cysts on both

2. AD inheritance

3. blood in urine and HTN until progressive renal failure
hydronephrosis =
progressive dilation of renal calyces => big holes
hydronephrosis is caused by:
urinary tract obstruction
pelvic kidney =
one fails to ascend due to obstruction by IMA
horse-shoe kidneys =
both fuse and don't ascend
renal cell carcinoma:

(2)
1. most common renal malignancy

2. men, 50-70
ureters transport:
urine form kidneys to bladder
**suprarenal / adrenal glands are supplied by:

(3)
superior, middle, and inferior renal arteries
adrenal glands are drained by:

(2)
the right and left suprarenal veins
abdominal aorta:

(2)
1. from T12 to L4

2. terminates as common iliacs
Abdominal Aortic Aneurysms are a result of:

(4)
1. athero

2. HTN

3. wound

4. infections
***the IVC returns blood from ___________ except for _______***
below the diaphragm;

blood from the gut
****structures on the left side of the body use ______ to get to the ____****
left renal vein;

IVC
portal veins => liver =>
hepatic veins => IVC
colon cancer imaging ~
apple core
the accessory hemizygos vein joins the azygos at:
T7
4 branches of SMA =
1. middle colic

2. right colic

3. iliocoli

4. jejunal and ileal branches
3 branches of IMA =
1. left colic

2. sigmoidal branch

3. superior rectal branch