classification of tissues: epithelial tissue tissue: a collection of similar cells working together...
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Classification of Tissues: Epithelial Tissue
Tissue: a collection of similar cells working together
Epithelial Tissue: cells that cover the surfaces of organs or form a lining within a cavity
Turn to: page 56 of the lab book and page 12-14 of the lab packet
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Apical surface: the very top surface of epithelial tissueBasement membrane (basal surface): the very bottom surface of epithelial tissueLumen: The open space above the apical surface of a structure
Epithelial Tissue
Apical Surface
Connective Tissue(another type of tissue;Always found supporting the basement membrane)
Basement Membrane
LUMEN
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Lumen: The inner open space or cavity of a tubular organ, as of a blood vessel or an
intestine.
Basement Membrane
LUMEN
Apical SurfaceConnectiveTissue
EpithelialTissue
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Classification of Epithelia
1. Number of cell layers
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2. Shape of the cells
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I will use BOTH microscopes AND histograms to test you on epithelial tissues.
Make sure you look at the microscopes in lab and the histograms in this presentation.
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Simple Squamous EpitheliaAlveoli (air sacs) of Lungs
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Page 56
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Simple Squamous Epithelium
L
L
L
L
LLL L
L
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Simple Squamous Epithelia
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Simple Squamous Epithelium
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Simple Cuboidal EpitheliaKidney Tubules Kidney Tubules
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Apicalsurface
Page 56
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Simple Cuboidal Epithelium
L
L
L
LL
L
L
Basement Membrane
Apical SurfaceConnectiveTissue
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Simple Cuboidal Epithelium
L
L
L
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Simple Cuboidal Epithelium
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Simple Columnar Epithelium
Small Intestine
Small IntestineCross Section
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Simple Columnar Epithelium
L
L
Lumen
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Simple Columnar Epithelium
Apicalsurface Basement
membrane
Connective Tissue
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Goblet Cells(mucus producing cell)
Magnified!!!
Goblet Cells
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Simple Columnar Epithelia: pointer is on the basement membrane
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Simple Columnar Epithelia: pointer is on a goblet cell
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Stratified Squamous Epithelia
Skin
Mouth & Esophagus
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Apicalsurface Lumen
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LUMEN
Stratified Squamous Epithelium
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LUMEN
Stratified Squamous Epithelium
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Stratified Squamous Epithelium
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Transitional EpitheliaUrinary Bladder
LumenLumen
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LUMEN
Transitional Epithelium
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Transitional Epithelia
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Transitional Epithelia: pointer is on the basement membrane
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Pseudostratified Ciliated Columnar Epithelia
TracheaLumen
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Pseudostratified Ciliated Columnar Epithelium
Cilia
LUMEN
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Pseudostratified Ciliated Columnar Epithelia
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Pseudostratified Ciliated Columnar Epithelia