Simple Squamous Epithelial
Side View
Simple Cuboidal Epithelial
Simple Columnar Epithelial
Stratified Squamous Epithelial
Stratified Cuboidal Epithelial Tissue
Stratified Columnar Epithelial Tissue
Rare – doesn’t
occur often in the
body
Pseudostratified Columnar Ciliated Epithelial
Non-ciliated type
Transitional Epithelial Tissue
What kind of tissue am I?
What kind of tissue am I?
What kind of tissue am I?
What kind of tissue am I?
What kind of tissue am I?
What kind of tissue am I?
What kind of tissue am I?
What is the function of
Epithelial Tissue?

Why do cells arrange themselves in single
layers or multiple layers?

Simple = allows quick absorption and filtration

Stratified = provides protection
What are the different shapes of
Epithelial Tissue?

There are three shapes of
epithelial cells:

Squamous – pancake like;
flat cells

Cuboidal –
length/width/height similar

Columnar – long,
rectangular shape
Where would you find certain
epithelial cells?

Where would you find squamous?



Simple = forms solid layer of cells which line blood
vessels, body cavities (lungs) and covers organs
very thin = controls diffusion and osmosis
Stratified = found mostly in the
epidermis (skin)
Where would you find certain
epithelial cells?

Where would you find
cuboidal?

Mostly simple cuboidal =
lines the ducts where
absorption and secretion
takes place; many are in
the kidneys

Stratified cuboidal exists,
but rare = they protect
areas such as ducts of
sweat gland, mammary
glands, and salivary glands
Where would you find certain
epithelial cells?

Where would you find
columnar?
 Simple
columnar
epithelial cells form
the lining of the
stomach and
intestines. Some are
specialized for
sensory reception
such as in the nose,
ears and the taste
buds of the tongue.
Goblet cells (unicellular glands) are
found between the columnar
epithelial cells of the small intestine.
They secrete mucus, which acts as a
lubricant.
What is the function of cilia?




Cilia are tiny hair-like
structures that beat in rhythm
to move secretions or objects
around.
Examples include tissue in the
brain which circulate the
cerebrospinal fluid
In the fallopian tubes which
move the egg from the ovary to
the uterus.
In the respiratory tract, where
cells sweep clean dust and
germs trapped in mucus
Classification of Epithelial Tissues