Arterial supply of the ascending colon comes from the ileocolic artery and right colic artery, both branches of the SMA.
From the en.wikipedia.org
The arterial supply comes via the left colic artery.
From the en.wikipedia.org
The proximal two-thirds of the transverse colon is perfused by the middle colic artery, a branch of SMA, while the latter third is supplied by branches of the IMA.
From the en.wikipedia.org
While the ileocolic artery is almost always present, the right colic may be absent in 5-15% of individuals.