Submucosa Back

The submucosa also consists of loose connective tissue. The  collagen fibers are more abundant, but in comparison to dense irregular connective tissue, it is much less dense and more cellular. This is a better region for identifying fibrocytes (A) and fibroblasts (B). [Nuclei of cells is below label.] Some of the fibroblast and fibrocyte nuclei in this section may be round because they were cut in cross section. Why do the nuclei of these two cells look different? How would you describe the nuclei?