Why does the location of colostomy affect the consistency of stool?

The location of a colostomy affects stool consistency due to the varying lengths of the colon that remain intact. A colostomy in the ascending colon typically produces more liquid stool because it is closer to the small intestine, where absorption is minimal. In contrast, a colostomy in the descending or sigmoid colon results in firmer stool, as these areas have more time to absorb water and form stool before it exits the body. Therefore, the farther along the colon the colostomy is located, the more solid the stool tends to be.