GI: Anatomy GI vessels, Peritoneum Disposition (Ach - 1 hr)
Describe the structures one would see on a cross-section CT at the L2 vertebrae
1 Right lobe of liver 2 Aorta 3 Inferior vena cava 4 Right renal vein 5 Left renal vein 6 Left renal artery 7 Superior mesenteric artery 8 Third part of duodenum passing between aorta and superior mesenteric artery 9 Loops of small bowel 10 Ascending colon 11 Transverse colon 12 Descending colon 13 Psoas muscle 14 Lower end crus of right hemidiaphragm 15 Lower end crus of left hemidiaphragm 16 Right renal pelvis 17 Rectus abdominis muscle 18 Transversus abdominis muscle 19 Internal oblique muscle 20 External oblique muscle 21 Latissimus dorsi muscle 22 Erector spinae muscle 23 Gerota's fascia 24 Fascia of Zuckerkandl
Describe the structures seen on this cross-section CT of the gut
1 Right lobe of liver 2 Confluence of splenic and superior mesenteric veins to form portal vein 3 Splenic vein 4 Head of pancreas 5 Second part of duodenum 6 Loops of small bowel 7 Hepatic flexure 8 Descending colon 9 Spleen 10 Aorta 11 Superior mesenteric artery 12 Inferior vena cava 13 Left adrenal gland 14 Right kidney 15 Renal cortex 16 Renal pyramid in renal medulla 17 Rectus abdominis muscle 18 Transversus abdominis muscle 19 Latissimus dorsi muscle 20 Erector spinae muscle
What are the portal-Caval Anastomoses?
1. l. gastric vein-- esophageal vein 2. superior rectal vein--middle and inferior rectal vein 3. paraumbilical v-- superior epigastric v 4. veins along the bare area of the liver-- inferior phrenic veins 5. omental/colonic/hepatic/splenic flexure-- retroperitoneal veins 6. PDA-- IVC
Describe the structures one would see on a cross-section dissection at the T12 vertebrae
A) Abdominal aorta B) Spleen C) Body of stomach D) Gastrolienal ligament E) Splenorenal ligament F) Lesser sac (omental bursa) G) Lesser omentum H) Hepatic duct I) Hepatic portal vein J) Pancreas K) Liver L) Falciform ligament M) Epiploic foramen N) Inferior vena cava O) Parietal peritoneum
Greater Sac vs Lesser Sac
Greater Sac = Pink Lesser Sac = Blue
What are the components and organs drained by the hepatic portal system?
The hepatic portal vein collects blood from the GI tract and delivers it to the liver for metabolism of nutrients and toxins.
What are the three branches of the Celiac Trunk?
The left gastric, splenic, and common hepatic arteries
What are the Mesenteries of the Gastrointestinal Tract? What are they derived from?
Yellow = foregut Green = midgut Blue = hindgut Darker pink = ventral mesentery Lighter pink = dorsal mesentery
Helpful Interactive Site for Anatomy
http://www.med.wayne.edu/diagRadiology/Anatomy_Modules/Abdomen.html https://mrimaster.com/anatomy%20abdomen%20axial.html https://www.med-ed.virginia.edu/courses/rad/CTAbdominalAnatomy/ http://www.slideshare.net/dedney/cross-sectional-anatomy-of-the-abdomen-annotated-presentation?next_slideshow=1 http://cosmos.phy.tufts.edu/~rwillson/medgross/abs5.htm
