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The interactive dog atlas · Organs · Abdomen

Ascending colon colon ascendens

The ascending colon is the first segment of the large intestine: short and straight, it runs up the right side of the abdomen, next to the duodenum.

Open in the interactive atlas Guide: Internal systems Worksheet

Educational material, not a diagnostic tool. Written by the Mantrailing România team from veterinary sources we read. Updated 14.11.2026.

Dog in left lateral view — exterior, muscles, skeleton and organs Vector study after the Ellenberger, Baum and Dittrich plates: a standing dog, head to the left, deep chest and digitigrade limbs. The four layers use the same contour: exterior with body regions, superficial muscles, skeleton and organs.
Ascending colon on the atlas drawing, "Organs" layer. Left lateral view, after the Ellenberger, Baum and Dittrich plates.

Where it is

Short, on the right of the root of the mesentery, medial to the descending duodenum (dashed outline).

Layer
Organs
System
Digestive system
Region
Abdomen

What it is and what it does

The ascending colon is the first segment of the colon: short and straight in the dog, it runs from the cecocolic junction up to the right colic flexure, on the right side of the root of the mesentery, medial to the descending duodenum, with the cecum caudoventral to it. Being on the right, it is drawn with a dashed outline.

Worth remembering

Being on the right, it is drawn with a dashed outline.

Names

  • Latin term: colon ascendens.
  • In Romanian: Colonul ascendent (Romanian page).

Guides it appears in

From the same region: Abdomen

All structures, in the atlas · Flashcards: organs