Extra Epithelium Questions Flashcards
Epithelium is made up of….
ALL germ layers
Membrane Epithelium
Arranged in sheets to cover the surface of the body
Cover and line body surfaces = inside AND outside of body
KNOW CLASSIFICATION OF EPITHELIUM CHART
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What is the function of keratinization?
Increased protection
Only on skin = stratified squamus epithelium
KNOW KERATINIZED EPITHELIUM PICTURES
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Pseudostratified Epithelium
Simple Columnar
Variable cell heights
All attach to basement membrane
Not all reach to surface of the epithelium
Typically with apical modifications = cilia or stereocilia
KNOW CLASSES OF EPITHELIUM SHEETS SLIDE
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Junctional Complex
Adhesion of epithelial cells to one another
Previously known as Terminal Bars
Components of Junctional Complex
Zonula Occludens (tight junctions; most apical)
Zonula Adherans
Macula Adherans (desmosomes; most basal)
Adhesion of Epithelial Cells to One another
Junctional Complex (Terminal bars)
Desmosomes (intercellular bridges)
Desmosomes
(manacula adherens)
Previously know as Intercellular Bridges
What are the 2 part of the Basal Lamina
Lamina Lucida
Lamina Densa
Glands are also known as…
Primitive Connective Tissue
Components of Glands
Parenchyma = Functional component of glands
1) Secretory epithelial cells
2) Epithelial cells of ducts (if ducts present)
Stroma = Structural and Supportive components
1) Connecting tissue matrix and cells
2) Blood vessels
3) Nerves
LOOK AT EXOCRINE VS ENDOCRINE PICTURES ON SLIDE
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Example of multicellular glands
Endocrine - Parathyroid Gland
Exocrine - Salivary Gland
Sebaceous secretion =
Sebum (lipids)
KNOW SHAPES OF SECRETORY CELL GROUPS OF EXOCRINE GLANDS
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KNOW TYPES OF EXOCRINE GLANDS
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Myoepithelial Cells
Basket Cells
Assists endocrine glands
Share basal lamina with secretory cells
Contractile cell with epithelial origin that assist with movement of secretory products out of endocrine glands
