5. Arterial, Venous And Nervous Supply Of GI Tract Flashcards
What embryological structure gives rise to the Oesophagus, stomach, first 1/2 of duodenum, liver, gall bladder and pancreas?
Foregut
What does the midgut give rise to?
Small intestine, caecum. Ascending colon and 3/4 of transverse colon
What embryological structure gives rise to final 1/4 of transverse colon, descending and sigmoid colon and rectum?
Hindgut
What are the three major arteries that supply the GI tract?
Coeliac trunk
Superior mesenteric
Inferior mesenteric
What artery supplies all mid gut derivatives?
Superior mesenteric
What area does the coeliac trunk supply?
All foregut derivatives
What area does the inferior mesenteric artery supply?
All hindgut derivatives
Where do each of the three major arteries that supply the GI tract arise from ?
Coeliac trunk - T12
Superior mesenteric artery - L1
Inferior mesenteric artery - L3
What are the three arterial branches of the coeliac trunk?
Left gastric artery - stomach/bottom of Oesophagus
Splenic artery - spleen
Common hepatic artery - liver,gallbladder, stomach , duodenum, pancreas
What are the branches of the superior mesenteric artery?
Pancreatic duodenal - pancreas/duodenal
Jejunal - jejunum
Ileal - ileum
Iliocolic - iliocecal junction
Anterior/posterior caecal - caecum
Appendicular - appendix
Middle/right colic - colon
What are the branches of the inferior mesenteric artery?
Left colic
Superior rectal
Sigmoid
Fill the gaps
The inferior mesenteric artery drains into the _____ vein
Splenic
What structure is formed when the splenic vein and the superior mesenteric vein unite?
Hepatic portal vein
What vein goes to liver cells and eventually into the inferior vena cava?
Hepatic portal vein
What is an anastomosis?
Connection between two vessels that allows blood flow between them
What are the three main sites where we find portosystemic anastamoses in the GI tract?
Oesophagus
Rectum
Anterior abdominal wall
Fill in the gaps n- portosystemic anastamoses
Portal hypertension forces blood through anastamoses
Small thin veins become ______ [dilated]
______ may burst causing _______
Varicose
Varies
Haemorrhage
How much of lymph formation is in the GI tract?
Half
What are the two functions of GI lymph?
Facilitates
- transport of lipids
- mucosal immune function
What is the name of the major lymph duct in the abdomen?
Cicterna Chyli
The cisterna chyli becomes the ____ duct after passing through the diaphragm
Thoracic
What is angiography?
Technique used to visualise blood vessels with x rays by use of a radiocontrast medium
What is the difference between conventional and CT angiography?
Conventional - x ray
CT - ct scan
