Pseudostratified Columnar Epithelial Tissue

Pseudostratified Columnar Epithelial Tissue

Author: Aaron Mullally

- be able to identify pseudostratified epithelial tissue by understanding its morphology

- understand why this is called pseudostratified

- know that this tissue forms the respiratory mucosa of the conducting airways

- know that this tissue contains many goblet cells

- know that this tissue is ciliated, review the difference between cilia and microvilli if necessary

In this packet you will learn about pseudostratified epithelial tissue.

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Overview of Pseudostratified Epithelial Tissue

Pseudostratified epithelium
- pseudo = false; stratified = multi layered
- some cells of this tissue are very short and don't reach the apical surface of the tissue, so the nuclei of the short cells are lower down giving a false multilayer look; all cells originate on the basement membrane
- also contains many goblet cells for mucus production
- the tall columnar cells that do reach the upper surface have cilia to propel the secreted mucus
- this is found lining the respiratory tract

Source: Self Made

Pseudostratified Columnar Epithelial Tissue

Here is an overview of pseudostratifeid columnar epithelial tissue

Source: Self made with use of images from Marieb's Textbook of Anatomy & Physiology & http://www.udel.edu/biology/Wags/histopage/colorpage/cep/cep.htm

Images of Pseudostratified Columnar Epithelium

Here are some images of pseudostratified columnar epithelial tissue for you to observe. Notice the cilia and goblet cells and try to identify where the basement membrane is while you look at these images (as you should have been doing with all of the other images as well)