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Epithelial Tissue (Types of epithelial tissue based on structural…
Epithelial Tissue
Types of epithelial tissue based on structural characteristics
Simple squamous Epithelium
Location
Blood vessels
Mesentary
Function
allows materials to pass through by diffusion and filtration
secretes lubricating substance
Simple Cuboidal Epithelium
Location
Ducts of small gland
Secretory portions of small glands
kidney tubeles
Function
Absorbs
Secretes
Simple columnar Epithelium
Location
digestive tract
Small intestine
Function
Absorbs
Secretes
Mucus
Enzymes
Pseudostratified Columnar Epithelium
Location
lines trachea
Lines much of the upper respiratory tract
Function
Secretes mucus
ciliated tissue moves mucus
Stratified Squamous Epithelium
location
Lines
Mouth
vagina
Esophagus
Epidermis of skin
Function
Protects agains abrasion
Stratified Cuboidal Epithelium
Location
Salivary glands
mammary glands
Sweat glands
Function
protective tissue
Stratified Columnar Epithelium
Location
Male urethra
ducts of some glands
Function
Secretes
Protects
Transitional Epithelium
Location
Lines
Urethra
Ureters
Bladder
Function
Protection
Allows urinary organs to expand and stretch
Characteristics
Cellularity
Cells close together
Special contacts
Tight Junctions
Located between Cells
Prevent substances from moving between cells
Desmosomes
Spots scattered
Resist tension pulling
Gap junctions
openings from one cell to the next
Polarity
Different on both sides
Supported by conective tissue
Avascularity
A = No
Vascularity = blood vessels
Innervation
Has nerves
regeneration
grows new epithelial tissue
Locations
Covers and lines inside of organs
Lining of GI tract organs
Lining hollow organs
Skin Surface