Lab Exercise Lab Exercise Classification of Classification of Tissues: Epithelial Tissues: Epithelial TissueTissueTissueTissue: a collection of similar cells : a collection of similar cells working togetherworking together

Epithelial TissueEpithelial Tissue: cells that line : cells that line the cavities and surfaces of organs & the cavities and surfaces of organs & structuresstructures

Pg. 56 of book and page 12-14 of Pg. 56 of book and page 12-14 of packetpacket

Classification of Classification of EpitheliaEpithelia

1. Number of cell layers1. Number of cell layers

2. Shape of the cells2. Shape of the cells

Lumen: The open space above Lumen: The open space above the apical surface of a the apical surface of a structurestructure

Epithelial Tissue

Apical Surface

Connective Tissue

Basement Membrane

LUMEN

Lumen: The inner open space or cavity Lumen: The inner open space or cavity of a tubular organ, as of a blood vessel of a tubular organ, as of a blood vessel

or an intestineor an intestine..

Basement Membrane

LUMEN

Apical SurfaceConnectiveTissue

EpithelialTissue

I will use I will use BOTHBOTH microscopes AND microscopes AND diagrams to test you on diagrams to test you on epithelial tissues. epithelial tissues.

Make sure you look at Make sure you look at the microscopes in lab the microscopes in lab and the diagrams in this and the diagrams in this presentation. presentation.

Simple Squamous EpitheliaSimple Squamous EpitheliaAlveoli (air sacs) of LungsAlveoli (air sacs) of Lungs

Simple Squamous Simple Squamous EpitheliumEpithelium

L

L

L

L

LL

Simple Cuboidal EpitheliaSimple Cuboidal EpitheliaKidney TubulesKidney Tubules

Kidney Tubules

Apicalsurface

Simple Cuboidal EpitheliumSimple Cuboidal Epithelium

L

L

L

Cross Section through Cross Section through the Small Intestinethe Small Intestine

Lumen

Simple Columnar Simple Columnar EpitheliumEpithelium

Apicalsurface Basement

membrane

Connective Tissue

Simple Columnar Simple Columnar EpitheliumEpithelium

L

L

L

Lumen

Stratified Squamous EpitheliaStratified Squamous EpitheliaSkinSkin

Apicalsurface

Lumen

LUMEN

Stratified Squamous EpitheliumStratified Squamous Epithelium

Stratified Squamous Epithelium

Pseudostratified Ciliated Columnar EpitheliaPseudostratified Ciliated Columnar EpitheliaTrachea (cross section)Trachea (cross section)

Lumen

Pseudostratified Ciliated Columnar Pseudostratified Ciliated Columnar EpitheliumEpithelium

CiliaLUMEN

Transitional EpitheliaTransitional EpitheliaUrinary BladderUrinary Bladder

LumenLumen

LUMEN

Transitional EpitheliumTransitional Epithelium

PRACTICE TIME!PRACTICE TIME!

Let’s see how you do!Let’s see how you do!

Name this tissue.Name this tissue.

Simple Cuboidal Simple Cuboidal EpitheliumEpithelium

Found where? Can you Found where? Can you identify the lumen? Apical identify the lumen? Apical and basement membrane?and basement membrane?

Name this tissueName this tissue

Stratified Squamous Stratified Squamous EpitheliumEpithelium

Where in the body is this found? Where in the body is this found? Can you find the lumen/apical Can you find the lumen/apical surface/basement membrane? surface/basement membrane? What is found under the basement What is found under the basement membrane?membrane?

Name this tissueName this tissue

Transitional Transitional EpitheliumEpithelium

Where can you find this in the Where can you find this in the body?body?

Name this tissueName this tissue

Simple Squamous Simple Squamous EpitheliumEpithelium

Note it’s just ONE layer of flat Note it’s just ONE layer of flat shaped cells! Where in the shaped cells! Where in the body do you find this body do you find this epithelium?epithelium?

Name this tissue.Name this tissue.

Simple Squamous Simple Squamous Epithelium (again!)Epithelium (again!)

Name this tissueName this tissue

Simple Columnar Simple Columnar EpitheliumEpitheliumCan you see the goblet cell? Can you see the goblet cell? What do they make?What do they make?

Name this tissue.Name this tissue.

Pseudostratified Pseudostratified Ciliated Columnar Ciliated Columnar EpitheliumEpithelium

Do you see the cilia? Where Do you see the cilia? Where in the body can you find this in the body can you find this epithelium?epithelium?

Epithelia Image Epithelia Image GalleryGallery

Simple Squamous Simple Squamous EpitheliaEpithelia

Simple Squamous Simple Squamous EpitheliaEpithelia

Simple Cuboidal EpitheliaSimple Cuboidal Epithelia

Simple Cuboidal EpitheliaSimple Cuboidal Epithelia

Simple Cuboidal EpitheliaSimple Cuboidal Epithelia

Simple Columnar Epithelia: Simple Columnar Epithelia: pointer is pointer is on the basement membraneon the basement membrane

Simple Columnar Epithelia: Simple Columnar Epithelia: pointer is pointer is on a goblet cellon a goblet cell

Simple Columnar EpitheliaSimple Columnar Epithelia

Simple Columnar EpitheliaSimple Columnar Epithelia

Non-Keratinized Stratified Squamous Non-Keratinized Stratified Squamous Epithelia: Epithelia: pointer is on the basement pointer is on the basement membranemembrane

Stratified Squamous EpitheliaStratified Squamous Epithelia

Stratified Squamous EpitheliaStratified Squamous Epithelia

Pseudostratified Ciliated Columnar Pseudostratified Ciliated Columnar Epithelia: Epithelia: pointer is on the basement pointer is on the basement membranemembrane

Pseudostratified Ciliated Columnar Pseudostratified Ciliated Columnar EpitheliaEpithelia

Pseudostratified Ciliated Columnar Pseudostratified Ciliated Columnar EpitheliaEpithelia

Pseudostratified Ciliated Columnar Pseudostratified Ciliated Columnar EpitheliaEpithelia

Transitional Epithelia: Transitional Epithelia: pointer is on pointer is on the basement membranethe basement membrane

Transitional Epithelia: Transitional Epithelia: pointer is on pointer is on the basement membranethe basement membrane

Transitional EpitheliaTransitional Epithelia

Transitional EpitheliaTransitional Epithelia