Quick Facts
Origin: Marginal artery (of Drummond).
Course: These arteries pass straight out, away from their origin towards the large intestine.
Branches: None.
Supplied Structures: All parts of the large intestine.
Origin
Many small vessels that arise from the anastomosing branches of ileocolic, right, middle, left colic and sigmoidal arteries. These together form a large arterial anastomotic circle often called the marginal artery (of Drummond) of the colon, and the straight arteries can be seen as originating from this anastomotic circle.
Course
Of varying length, these arteries pass straight out, away from their origin off the marginal artery of the colon (of Drummond) to the inner aspect of the large intestine.
Branches
There are no named branches, however, as the straight arteries approach the large intestine, they send vessels anterior and posterior to the local portion of colon, which they encircle it.
Supplied Structures
The straight arteries of the colon supply all portions of the large intestine, including the: cecum and the ascending, transverse, descending, and sigmoid colon.
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Artery
When the artery is occluded blood is forced through the collateral vessels, drastically increasing fluid shear stress and triggering an inflammatory response which drives vessel remodeling.
