When you look at a cross-section of the columnar epithelium of the intestines under a microscope, you'll see several types of cells. Here's a breakdown:

1. Enterocytes (Absorptive Cells): These are the most numerous and prominent cells. They have a tall, columnar shape with a brush border at the apical (top) surface. This brush border is composed of microvilli, which greatly increase the surface area for absorption of nutrients from digested food.

2. Goblet Cells: These cells are interspersed among the enterocytes and have a goblet-like shape due to their large, mucus-filled vacuole. Goblet cells secrete mucus, which lubricates the intestinal lining and helps protect it from abrasion and harmful substances.

3. Paneth Cells: Found at the base of the intestinal crypts, these cells have a granular appearance and are responsible for secreting antimicrobial peptides and enzymes that contribute to the intestinal immune defense.

4. Enteroendocrine Cells: These cells are scattered among the other cells and secrete hormones that regulate digestion, appetite, and other functions.

5. Stem Cells: Located in the intestinal crypts, these cells are responsible for continuously renewing the intestinal epithelium by dividing and differentiating into other cell types.

6. Other Immune Cells: You may also see various immune cells, like lymphocytes, macrophages, and dendritic cells, which are important for the gut's immune response.

Key features to look for:

* Tall, columnar shape of enterocytes

* Brush border on enterocytes

* Goblet cells with large, mucus-filled vacuoles

* Paneth cells at the base of the crypts

* Presence of other cell types (enteroendocrine cells, immune cells, etc.)

Remember that the specific types and proportions of cells may vary depending on the region of the intestine being examined.