Here's an image you wont see every day (because it's bloody hard to make a section like this! This comes from a 60 year old slide.)
Enamel forming cells - ameloblasts from the forming canine tooth of a domestic cat. Cells sectioned perpendicular to their length. #Histology

Ameloblasts are long tube like cells, they align perpendicular to to the enamel surface they are forming. Like in this image.
The yellow like shows the plane the previous image came from. #Histology #Teeth

In some of the cells in the first image, the section passes though the nucleus of the cell, this is why some of the cells are darker - we see their nucleus stained with a different stain. Lighter cells are sectioned elsewhere though the cell body and miss the nucleus. #histology