Hello everyone,how are you all? Hope you all are doing well.we learnt many things in abdomen and now we are going learn about important blood vessels in abdomen.in the last post we learned about how the aorta supplies the digestive tract. Now lets learn in depth.....
COELIAC TRUNK
Coeliac trunk is one of the major branch of abdominal aorta.it is ventral branch.it originates at lower border of T12 vertebrae.
Branches
Coeliac trunk gives 3 branches -
1)Left gastric artery
2)Common hepatic artery
3)Splenic artery/Lienal artery
Left gastric artery supplies to lesser curvature of stomach and it gives oesophageal branches.
Splenic artery passes behind the stomach and it gives three branches there.dorsal pancreatic branch, Arteria pancreatica magna, Arteria pancreatica caudae, short gastric artery, left gastroepiploeic artery, hilar branches
Common hepatic artery is a short blood vessel that supplies oxygenated blood to the liver, pylorus of the stomach, duodenum, pancreas, and gallbladder.its branches are proper hepatic artery, right gastric artery, gastroduodenal artery
Gastroduodenal artery gives two branches one is right gastroepipoliec artery which supplies at greater curvature of stomach and superior pancreatico duodenal artery which travels in between duodenum and pancreas.
Proper hepatic artery divides into two branches right hepatic artery and left hepatic artery.cystic artery is a branch of right hepatic artery which supplies gall bladder.
This looks so hard to understand but once you see images that i shared you can understand.
SUPERIOR MESENTERIC ARTERY
The superior mesenteric artery (SMA) is a ventral branch of the abdominal aorta,it is just inferior to the origin of the celiac trunk, and supplies blood to the intestine from the lower part of the duodenum through two-thirds of the transverse colon, as well as the pancreas.
the SMA arises anterior to inferior border of vertebra L1.
We already learnt that superior mesenteric artery supplies the midgut.
Branches of superior mesenteric artery
1)inferior pancreaticoduodenal artery travels in between pancreas and duodenum.
2)jejunal arteries
3)ileal arteries
Supplies jejunum and ileum.
Image source
4)ileo-colic artery supplies ileum and some part of colon.
Image source
5)right colic artery the number 4 is labelled as right colic artery in below image.it supplies ascending colon.
6)middle colic artery supplies upto 2/3rd part of transverse colon.
Image source
Clinical significance
1)Nutcracker syndrome
The compression of the left renal vein (LRV) between the abdominal aorta (AA) and superior mesenteric artery (SMA),
Image source
2)Superior mesenteric artery syndrome
INFERIOR MESENTERIC ARTERY
It arises from abdominal aorta at body of L3 vertbrae level.
Branches of inferior mesenteric artery
1)left colic artery supplies to remaining 1/3rd part of transverse colon and descending colon
2)sigmoidal branches
It continues as superior rectal artery and supplies to rectum.
Below are the images for better understanding.
Image source
Marginal artery of drummond
It is an artery that connects the inferior mesenteric artery with the superior mesenteric artery.
REFERENCES
- Gray's Anatomy:The Anatomical Basis of Clinical Practice,41st Edition Page no 1088,1182
This is all about major blood vessels of abdomen and how they supply digestive tract and its clinical significance.in the next post we are going to learn about venous drainage and kidney.stay tuned
Thanks for reading,
With regards,
