Simple Epithelial Tissue 
Cells are arranged in rows or sheets one cell thick.
Read the descriptions of the different simple epithelia below and select the best choice using all the clues you can find.

Simple Squamous

Cells resemble tiles or pancakes in shape.
(nuclei tend to be flattened)

Viewed from the side the cells are not tall at all,
but they are very wide.

Viewed from above
the cells often look round or many-sided and fairly large.
Simple Cuboidal

Cells resemble cubes or square blocks in shape.
(nuclei tend to be roundish)

Viewed from the side
the cells are equally tall and wide.


Simple Columnar

Cells resemble rectangular blocks or columns in shape.  (nuclei tend to be oval)

NUCLEI tend to be at about THE SAME HEIGHT
in adjacent cells.

Viewed from the side
the cells are very tall, but they are not that wide.

Pseudostratified Columnar

Cells resemble rectangular blocks or columns in shape. (nuclei tend to vary in shape)

NUCLEI tend to be at VERY DIFFERENT HEIGHTS
in adjacent cells.
(this gives the deceptive appearance of multiple layers)

Viewed from the side
the cells are very tall, but they are not that wide.

You can often see two nuclei overlapping each other.
NOTE:

A single
simple squamous epithelial cell
may make up the entire circumference of a small capillary wall.

Seen in cross-section
this sometimes resembles
an adipose cell.

Look for other clues such as
red blood cells within the capillary,
the presence of other adipose cells
or blood vessels nearby, etc.

(c) 2006 Jackie Lindbeck