Simple Squamous EpithelialSimple Squamous Epithelial

Side View

Simple Cuboidal EpithelialSimple Cuboidal Epithelial

Simple Columnar EpithelialSimple Columnar Epithelial

Stratified Squamous EpithelialStratified Squamous Epithelial

Stratified Cuboidal Epithelial TissueStratified Cuboidal Epithelial Tissue

Stratified Columnar Epithelial TissueStratified Columnar Epithelial Tissue

Rare – doesn’t occur often in the

body

Pseudostratified Columnar Ciliated EpithelialPseudostratified Columnar Ciliated Epithelial

Non-ciliated type

Transitional Epithelial TissueTransitional 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 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 What is the function of Epithelial Tissue?Epithelial Tissue?

Why do cells arrange themselves in single Why do cells arrange themselves in single layers or multiple layers?layers or multiple layers?SimpleSimple = allows quick absorption and filtration = allows quick absorption and filtration

StratifiedStratified = provides protection = provides protection

What are the different shapes of What are the different shapes of Epithelial Tissue?Epithelial Tissue?

There are three shapes of There are three shapes of epithelial cells:epithelial cells: SquamousSquamous – pancake like; – pancake like;

flat cellsflat cells

CuboidalCuboidal – – length/width/height similarlength/width/height similar

ColumnarColumnar – long, – long, rectangular shaperectangular shape

Where would you find certain Where would you find certain epithelial cells?epithelial cells?

Where would you find Where would you find squamoussquamous?? SimpleSimple = forms solid layer of cells which line blood = forms solid layer of cells which line blood

vessels, body cavities (lungs) and covers organsvessels, body cavities (lungs) and covers organs very thin = controls diffusion and osmosisvery thin = controls diffusion and osmosis

StratifiedStratified = found mostly in the = found mostly in the

epidermis (skin)epidermis (skin)

Where would you find certain Where would you find certain epithelial cells?epithelial cells?

Where would you find Where would you find cuboidalcuboidal??

Mostly Mostly simplesimple cuboidalcuboidal = = lines the ducts where lines the ducts where absorption and secretion absorption and secretion takes place; many are in takes place; many are in the kidneysthe kidneys

StratifiedStratified cuboidalcuboidal exists, exists, but rare = they protect but rare = they protect areas such as ducts of areas such as ducts of sweat gland, mammary sweat gland, mammary glands, and salivary glandsglands, and salivary glands

Where would you find certain Where would you find certain epithelial cells?epithelial cells?

Where would you find Where would you find columnarcolumnar??

Simple columnarSimple columnar epithelialepithelial cells form cells form the lining of the the lining of the stomach and stomach and intestines. Some are intestines. Some are specialized for specialized for sensory reception sensory reception such as in the nose, such as in the nose, ears and the taste ears and the taste buds of the tongue. buds of the tongue.

Goblet cellsGoblet cells (unicellular glands) are (unicellular glands) are found between the columnar found between the columnar epithelial cells of the small intestine. epithelial cells of the small intestine. They secrete mucus, which acts as They secrete mucus, which acts as a lubricant.a lubricant.

What is the function of cilia?What is the function of cilia? CiliaCilia are tiny hair-like are tiny hair-like

structures that beat in rhythm structures that beat in rhythm to move secretions or objects to move secretions or objects around. around.

Examples include tissue in the Examples include tissue in the brain which circulate the brain which circulate the cerebrospinal fluidcerebrospinal fluid

In the fallopian tubes which In the fallopian tubes which move the egg from the ovary move the egg from the ovary to the uterus. to the uterus.

In the respiratory tract, where In the respiratory tract, where cells sweep clean dust and cells sweep clean dust and germs trapped in mucusgerms trapped in mucus

Classification of Epithelial TissuesClassification of Epithelial Tissues