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Pseudostratified columnar epithelium

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

Pseudostratified columnar epithelium <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

Pseudostratified columnar epithelium

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

- Columnar cells <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

- Columnar cells

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

-- Columnar cell nuclei <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

-- Columnar cell nuclei

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

-- Stereocilia <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

-- Stereocilia

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

- Basal cell nuclei <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

- Basal cell nuclei

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

Basement membrane <p>Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x </p>

Basement membrane

Pseudostratified epithelium is a unique type of simple epithelium that consists of both tall columnar cells and short basal cells. Because both cell types rest on the basement membrane, the epithelium is classified as simple. However, the layered appearance of the nuclei make this epithelium appear stratified, hence the term, pseudostratified. Because this is truly a simple epithelium, it can possess surface specializations, such as stereocilia seen here. Epididymis, 400x

Terminal bars > <p>The terminal bar represents a complex of cell junctions located at the apex of the columnar cell. These junctions provide for cell-to-cell attachment as well as preventing intercellular leakage of luminal contents. The individual components of the complex cannot be resolved with the light microscopic and thus they appear as a small, red dot or bar at the luminal surface of adjacent epithelial cells.</p>

Terminal bars >

The terminal bar represents a complex of cell junctions located at the apex of the columnar cell. These junctions provide for cell-to-cell attachment as well as preventing intercellular leakage of luminal contents. The individual components of the complex cannot be resolved with the light microscopic and thus they appear as a small, red dot or bar at the luminal surface of adjacent epithelial cells.

Main Slide Pseudostratified columnar epithelium - Columnar cells -- Columnar cell nuclei -- Stereocilia - Basal cell nuclei Basement membrane Terminal bars >