Test #2 Flashcards
Is the aorta retroperitoneal or intraperitoneal?
Retroperitoneal
where does the aorta extend from and to?
extends from the left ventricle of the heart to the bifurcation of the common iliac arteries
where does the aorta begin in the abdominal portion?
2.5 cm above the transphyloric line at the aortic hiatus in the diaphragm (T12)
what are the branches of the abdominal aorta?
- Celiac trunk
- SMA
- L/R Suprarenal arteries
- L/R renal arteries
- L/R gonadal arteries
- Lumbar arteries
- IMA
- Branches into L/R common iliac arteries
- Median sacral artery
Where is the L/R suprarenal arteries located?
same level as SMA
What comes off the celiac trunk?
- Left gastric artery
- Common hepatic artery
- Splenic artery
what are the unpaired visceral branches of the aorta?
Celiac trunk
SMA
IMA
What are the paired visceral branches of the aorta?
Suprarenal arteries
Renal arteries
Gonadal arteries
what do the visceral branches of the aorta supply to?
organs of the abdominal cavity
What does the parietal branches of the aorta supply to?
the abdominal wall
what is the anterior branch of the aorta?
celiac trunk
what level is the celiac trunk at?
L1
What are the branches of the celiac trunk?
Left gastric artery
Splenic artery
Common hepatic artery
where does the left gastric artery course?
superior and left lateral
What does the left gastric artery supply to?
the lesser curvature of the stomach
True or false, the left gastric artery is anastomoses with the right gastric artery?
true
where does the left splenic artery course?
travels left towards the splenic hilum
What does the left splenic artery supply?
spleen, pancreas, stomach, and greater omentum
what does the left splenic artery form?
the superior border of the pancreas
is the Left splenic artery visualized?
yes, it is tortuous
where does the common hepatic artery course?
horizontally to the right
What does the common hepatic artery branch into?
- Gastroduodenal artery
- proper hepatic artery
- right gastric artery
Where does the GDA course?
Inferiorly
Where is the GDA used as a landmark?
used as landmark in the head of the pancreas
where does the GDA supply?
the liver by branching into the right and left hepatic arteries
what does the Right gastric artey supply to?
Medial aspect of the stomach
true or false, the right gastric artery is anastomoses with the left gastric artery?
true
What level is the SMA located?
L1 (just below the transpyloric line)
which way does the SMA course?
anteroinferorly
what does the SMA supply?
- small intestine
- caecum and ascending colom
- most of transverse colon
what part of the aorta does the renal arteries branch off?
lateral part of the aorta
Where is the SMA located?
L2 level
where does the Right Renal Artery run compared to the IVC?
RRA runs posterior to IVC
Compare the location of SMA, Left renal vein, and splenic vein
SMA is anterior to the LRV and posterior to splenic vein (look at pic on powerpoint)
Where are the gonadal arteries?
just inferior to the renal vessels (lower level of L2)
Where do the gonadal arteries descend along?
psoas muscle, over the external iliac vessels
What do the gonadal arteries supply in males and females?
male-goes through inguinal ring to enter spermatic cord on way to testes
female-into the pelvic cavity and continue on the suspensory ligament to supply the ovary
Are the gonadal arteries visualized?
not readily
paired or unpaired aortic branches supply the posterolateral abdominal walls?
paired
What level does the aorta bifurcate?
L4
What level does the bifurcation of the aorta divide into internal and external iliac arteries?
L5-S1
What does the internal iliac arteries supply?
the wall and the viscera of the pelvis, perineum, and gluteal region
What does the external arteries supply?
Continuous with the femoral artery and supplies lower limb
whats the landmark of the celiac trunk to the pancreas?
superior to the pancreas
Where is GDA to the pancreas?
head of pancreas
Where is the SA compared to the Pancreas?
Superior to pancreas
Where is the SMA compared to the pancreas?
Inferior to pancreas
Where do the R/L common iliac veins join to form the the IVC?
anterior to the L5 vertebral body
Where does the IVC go in relation to the liver
posterior to the liver
Where does the IVC pass through the diaphragm?
T8 before draining into the lower part of the right atrium
Where does the IVC lie in relation to the aorta?
slightly right
What level is the IVC posterior to the aorta?
L5
is the IVC retro or intraperitoneal?
retro
What is the IVC anterior to?
the right psoas muscle, RRA, and right suprarenal gland
what is the IVC posterior to?
superior mesenteric vessels, pancreatic head, and the horizontal (3rd) part of the duodenum
what are the lumbar veins?
4-5 pairs of vessels that collect blood from the muscles and skin of the posterior abdominal wall
Where do the left and right gonadal veins drain?
Ascends retroperitoneally
Right-opens directly into the IVC
Left-drains into the left renal vein
what level are the renal veins located?
2nd lumbar vertebrae
do the renal veins run posterior or anterior to the renal arteries
anterior
Where are the renal veins located?
few centimeters superior to gonadal veins at L2 vertebral level.
are the renal veins anterior or posterior to the renal arteries?
anterior
LRV
- drains left kidney
- receives the left suprarenal vein and left gonadal vein before emptying into the IVC
- LRV passes anteriorly to aorta just inferior to the origin of SMA
RRV
- drains right kidney
- slightly inferior to the LRV because the right kidney is lower than the left
- RRV IS SHORTER AND NARROWER THAN LRV
- Passes posterior to the second part of the duodenum
where does the right supernal vein empty?
directly into the posterior aspect of the IVC
where does the left suprarenal vein empty?
into the left renal veins
which suprarenal vein is shorter?
right suprarenal vein is shorter than the left
what is the role of the hepatic veins?
drain blood from the liver
what does the central veins of the liver lobules collect?
blood from the intralobular venous sinusoids
What do the central veins merge to form?
right, middle and left hepatic veins
where do the hepatic veins exit?
from the posterior surface of the liver and empty directly into the IVC.
What does the hepatic portal system drain?
all of the nutrient rich blood from the stomach, intestines, pancreas, and spleen
where does the blood in the hepatic portal system deliver?
to the liver to be processed via the portal vein
all blood must pass through what before entering the IVC?
must pass through the liver
IMV=________
Splenic vein
SMV + Splenic Vein =______
Hepatic portal vein
Hepatic Portal Vein =________
LT & RT Portal Veins
LT & RT Portal Veins=__________=___________
continual branching=sinusoids in liver lobule
Blood travels to central veins of the _______
sinusoids
Central veins=________=________
hepatic veins=IVC
what makes up the portal triad?
- Portal vein
- Hepatic artery
- Bile Duct
what does the superior mesenteric vein drain?
- small intestine
- cecum
- Ascending colon
- transverse colon
where does the SMV go?
ends behind the neck of the pancreas where it joins the splenic vein to form the hepatic portal vein
What does the Inferior Mesenteric Vein drain?
- Descending colon
- Sigmoid colon
- rectum
Where does the IMV empty?
into the splenic vein posterior to pancreatic body.
What does the splenic vein drain?
- Spleen
- Pancreas
where does the splenic vein travel?
travels posterior to the pancreas, joins SMV posterior to pancreatic neck to form hepatic portal vein
The IMV drains into the ______
Splenic vein
what vessels form to make the portal confluence?
splenic vein and SMV
what cavity is closed to the exterior?
serous (pleural, pericardial, peritoneal)
what does the serous membrane do?
secrete a serous fluid that lubricates the surfaces of membranes, reducing friction
what is the peritoneum?
thin membrane that forms the lining of the abdominal cavity and covers the organs or cavity
what supports the viscera ad provides a pathway for blood vessels and lymph?
peritoneum
is the peritoneal cavity open or closed in males?
closed
is the peritoneal open or closed in females?
open. uterine tubes, uterus, and vagina
what is the rectouterine pouch?
in females! peritoneum over the anterior surface of the rectum extends to the uterus
what is the vesicouterine pouch?
in females! the peritoneum over the anterior surface of the rectum extends to the uterus then over the uterus anteriorly to the bladder
What is the rectovesical pouch?
in males! The peritoneum extends from the upper anterior portion of the rectum, to the bladder
What is a cul-de-sac?
??????
what is mesentery?
A fused double layer of peritoneum that encloses the intestine
what is the function of mesentery?
- attach the intraperitoneal structures in the abdominal cavity to the abdominal wall (suspends organs in abdominal cavity)
- Serves as a conduit for blood vessels, lymphatic vessels, and nerves
Where is the mesentery?
suspensory portion of double layered peritoneum in between the parietal wall of the abdominal cavity and the intestine.
What is a omenum?
a “mesentery”, or double layer of peritoneum, that is attached to the stomach
describe the greater omentum?
- A fold of peritoneum that descends from the greater curvature of stomach and proximal duodenum
- Folds back up and attaches to the anterior surface of the transverse colon
Describe the lesser omentum
A fold of peritoneum that goes from the lesser curvature of the stomach and proximal duodenum to the liver
what is fat deposition?
acts as a fat storage area
What is the immune contribution of the greater omentum?
`-collections of marcophages
-eats bacteria and dead cells (phagocytosis)
where is the lesser omentum?
goes from the lesser curvature of the stomach and proximal duodenum to the liver
what ligaments does the lesser curvature form?
Forms hepatogastric and hepatoduodenal ligaments
What is another name for Foramen of Winslow
epiploic foramen
where does the greater sac go?
extends from the diaphragm to the pelvic cavity
what is another name for the greater omentum?
abdominopelvic cavity
what is another name for lesser sac?
omental bursa
what is the epiploic foramen? (Foramen of winslow)
passageway between the greater and lesser sacs to allow for communication between these 2 spaces (allows passage of vessels and nerves)
what is the difference between the Peritoneum, Mesentery, and omenta?
Peritoneum- : thin single continuous serous membrane that lines cavities
Mesentery-double layer of peritoneum that suspends intestines from the abdominal wall.
Omenta-double layer of peritoneum that connects the stomach to other viscera.
what are peritoneal ligaments?
double fold of peritoneum that connects viscera together or connects viscera to the abdominal wall
Basically anything that is not a mesentery or omentum is considered ___________
peritoneal ligament