1.4.1 GI Vasculature, Lymphatics, and ANS Flashcards
What vertebral level is the celiac trunk at?
T12/L1
Name the unpaired (3) and paired arteries (6) that come off the abdominal aorta (from top to bottom)
What vertebral level is the SMA at?
L1
What do each of these colored dots represent?
At what vertebral level, does the celiac trunk branch off?
T12/L1
What are the three branches of the hepatic proper?
Right gastric artery, L/R hepatic artery
What two veins join together to form the hepatic portal vein?
SMV and splenic vein
What is the artery that runs all along the large intestine?
The marginal artery of drummond
When the common hepatic artery bifurcates at the pylorus, what does it give rise to?
Hepatic proper artery (ascending)
Gastroduodenal artery (descending)
What vertebral level are the renal artery/vein at?
L1/L2
The left gastric will send some blood cranially to what organ?
Esophagus
What is one of the key anatomic characterics of the splenic artery that help identify it?
Highly coiled
What are the three branches of the IMA?
Left Colic
Sigmoid (3-4 branches)
Superior Rectal
What are some of the anastomoses b/t Celiac artery and SMA?
What is the variation (uncommon) in anastomotic connection b/t the SMA and IMA?
Arc of Riolan
What are some of the branches of the splenic artery?
Pancreatic branches
Short gastric arteries (fundus)
Left gastro-omental (greater curvature of stomach)
What are the four ways that the portal system can interact with the caval system in instances of portal HTN?
Esophageal plexus
Paraumblicial plexus
Rectal plexus
Retroperitoneal plexus
What is variable about the formation of the portal vein?
IMV
Name the three major branches of the celiac trunk
Left gastric, splenic, common hepatic
What is unique about the hepatic portal venous system?
NO VALVES! (blood rich in nutrients, especially after a meal)
Describe the preganglionic and postganglionic length in the sympathetic and parasympathetic system
What is the main function of visceral efferent fibers? visceral afferent fibers?
visceral efferent fibers: motor
visceral afferent fibers: sensory
Name this condition
Portal HTN leading to “Caput Medusae”
What vertebral level does the aorta bifurcate at?
L4
Foregut organs has lymph that typically drains where? Midgut? Hindgut?
Forgut: Celiac
Midgut: SMA
Hindgut: IMA
What vertebral level is the IMA at?
L3
Where does the superior mesenteric artery (MSA) branch off the abdominal aorta?
L1
Identify the splanchnic nerves and their ganglions/organs.
What level does the aorta cross the diaphragm?
T12
Both the celiac artery and SMA run behind what organ and split which organ?
Behind: duodenal bulb
Split: pancreas
What are the three main branches of the SMA? (What do they supply with blood?)
Middle colic (transverse colon)
Right colic (ascending colong)
Ileocolic (ileocolic junction structures)
The celiac trunk provides blood to what type of organs?
Foregut organs
The IMA supplies blood to what type of organs?
Hindgut organs
Portal HTN will have what effect on the esophageal plexus?
Lower esophageal venous varices (abnormally dialated veins)
The four colored lines are pointing at which structures anterior to the abdominal aorta?
The SMA descends anterior to these three structures
L renal vein, 3rd part duodenum, uncinate process of pancreas
What type of organs receive blood from the SMA?
Midgut organs
What occurs around the abdominal aorta at these levels: T12, T12/L1, L1/L2, L1, L3, L4
T12: diaphragm
T12/L1: Celiac trunk
L1/L2: Renal A and V
L1: SMA
L3: IMA
L4: Aortic bifurcation
