GENERAL HISTOLOGY

Detailed explanation-1: -Pseudostratified columnar epithelia line the respiratory tract. They exist in one layer, but the arrangement of nuclei at different levels makes it appear that there is more than one layer.

Detailed explanation-2: -Pseudostratified epithelium one layer of cells, but the nuclei are at different heights, so it looks as though it is more than one layer. These epithelia usually have goblet cells present.

Detailed explanation-3: -Unlike the epithelium of the skin, a pseudostratified ciliated columnar epithelium appears to have multiple layers, but is actually only comprised of a single sheet of cells.

Detailed explanation-4: -Therefore, pseudostratified columnar epithelium is a falsely striated tissue (and therefore, a single layer of cells) composed of columnar-shaped cells that line an organ or cavity space.