Extra Epithelium Questions Flashcards
(20 cards)
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
