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Project Components:

Powerpoint Project……….Epithelial Lecture

Excel Component………...Visual Outline

Word Component…………Student Notes

Powerpoint Component…...Student Quiz

Created by… Stephen Chitraroff

Why are Epithelial Why are Epithelial Tissues Tissues

Important to Me?Important to Me?

Anatomy and PhysiologyMVHS ScienceMr. Chitraroff

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Begin

What is a Tissue?What is a Tissue?

organelles

cells

tissues

tissue systems

organs

organ system

organismMain Menu

What is Epithelium?What is Epithelium?

Epithelial tissues are widespread throughout the body and are responsible for:

covering all body surfaces. lining body cavities and hollow organs. form the major tissues in glands. perform a variety of functions including:

AbsorptionAbsorption FiltrationFiltration ExcretionExcretion SecretionSecretion DiffusionDiffusion ProtectionProtection

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What are the 3 Main What are the 3 Main Categories of Epithelium?Categories of Epithelium?

• The 3 main categories of epithelium areThe 3 main categories of epithelium are:– Squamous (squashed or flattened).– Cuboidal (cube-shaped)– Columnar (rectangular)

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Epithelial CategoriesEpithelial Categories

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Epithelium Can Have Epithelium Can Have Different Layers!Different Layers!

FormForm FunctionFunction LocationsLocations

SimpleSimple Single layer Absorption Blood Vessels

StratifiedStratified Multiple layers Protection Skin, Dig. Tract

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Single Vs. Stratified Single Vs. Stratified EpitheliumEpithelium

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Epithelium Index PageEpithelium Index Page

Cilia and Microvilli

Simple Squamous Stratified Squamous

Transitional

Simple Columnar Ciliated Simple Columnar

Psuedostratified Columnar

Stratified Columnar

Simple Cuboidal Stratified Cuboidal

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Cilia and Cilia and MicrovilliMicrovilli

• CiliaCilia are protein-based structures that move in a wavelike fashion.– Function: Cilia function to filter respiratory tracts or

move objects through a cavity.

• Microvilli:Microvilli: Microvilli are globular structures.– Function: used primarily for absorption and secretion of

materials.Main Menu

Simple SquamousSimple Squamous

• Locations: Capillary walls, alveoli of the lungs, covering visceral organs, lining body cavities

• Function: diffusion and filtration

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Stratified SquamousStratified Squamous

• Locations: Integument (Skin), mouth, vagina, anus.

• Function: protection. Main Menu

Transitional EpitheliumTransitional Epithelium

• Locations: Ureter, urinary bladder.

• Function: distention and elasticity.

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Simple Columnar EpitheliumSimple Columnar Epithelium

• Locations: lining of the digestive tract.– Small intestine

– Large intestine

– Rectum

• Function: Protection, secretion, absorption.

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Ciliated Simple Columnar Ciliated Simple Columnar EpitheliumEpithelium

• Locations: lining of the respiratory tract.

– trachea

– Nasal passageway

– Bronchi of lungs

• Function: move pollutants to the mouth where they are swallowed.

– Filtration.

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Ciliated Pseudostratified Ciliated Pseudostratified Columnar EpitheliumColumnar Epithelium

(PSE) (PSE) (PSE) (PSE)

• Locations: lining of the respiratory tract.

– trachea

– Nasal passageway

– Bronchi of lungs

• Function: move pollutants to the mouth where they are swallowed.

– Filtration.

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Ciliated PSECiliated PSE

NOTE: This type of epithelium is often confused with stratified columnar epithelium due to the arrangement of the nuclei.

Free Surface

Basement Membrane

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Stratified Stratified Columnar Columnar EpitheliumEpithelium

• Locations: largest ducts of the salivary glands.

– Submandibular gland (lower jaw)– Parotid gland (side of face)– Mucosal glands (amylase-releasing)

• Function: passageway for digestive enzymes released by salivary glands.

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Simple Simple Cuboidal Cuboidal

EpitheliumEpithelium

• Locations: lining kidney tubules, salivary ducts and pancreatic ducts (pancreas).

• Function: secretion, excretion and absorption.

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Stratified Cuboidal EpitheliumStratified Cuboidal Epithelium

• Location: sweat ducts in the dermis layer of the skin.

• Appearance: generally 3-4 layers thick.

• Function: secretion of and transportation of sweat to the skin’s surface.

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Transitional EpitheliumTransitional Epithelium

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