Final answer:
Colostomy stool is more formed due to water absorption in the colon, whereas ileostomy stool is typically liquid or very loose as it comes from the small intestine, which does not absorb as much water.
Step-by-step explanation:
The subject of this question involves the differences in stool composition following two types of stoma surgeries: a colostomy and an ileostomy. In the case of a colostomy, the stool is more formed since it originates from the colon, which is the main part of the large intestine that is responsible for the absorption of water and salts, consequently turning liquid chyme into semisolid feces. On the other hand, the stool from an ileostomy is less formed, typically liquid or very loose, because the process involves the distal ileum of the small intestine, which hasn't absorbed the majority of the water yet, hence the fecal output is watery chyme collected in a bag-like appliance attached to the abdomen.