chapter 8 embryo
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Epithelium lines the _________ and _________ body surfaces.
TAPSS is the function of the epithelium. What does it mean?
- Tissue Absorption
Epithelium is ________ grouped cells with little or no __________ substance or _______ fluid.
Are there blood vessels in epithelium?
Oxygen and nutrition come from the __________ tissue through __________.
What is the Rapid Turnover Time? What does it have everything to do with?
- How quickly the cells can replace themselves.
- Periodontal disease
Epithelial cells reproduce by _______ so they can grow back quickly.
What are the three classifications of layers?
- simple epithelium
- stratified epithelium
- pseudostratified epithelium
What is simple epithelium?
Only ONE layer of cells above the basement membrane
What is stratified epithelium?
MULTIPLE layers above the basement membrane
What is pseudostratified epithelium?
Cells look like multiple layers because they are different heights, but each one contacts the basement membrane.
What are the three shapes of cells?
Squamous cells are __________ _____-like cells called "________". Cell height is ____ than cell width.
- less than
Cuboidal cells are ____-shaped with a cell height _____ to cell width.
Columnar cells are _________ or tall. The cell height is ____ cell width
Keratin is a tough, ______, waterproof ______ that blocks bacteria and is resistant to _______.
What does it mean when a tissue is keratinized?
The tissue always produces keratin because it is in place of heavy use.
What is non-keratinized?
The tissue usually doesn't produce keratin unless it is put under extra stress and needs the protection. It then becomes hyperkeritinized.
Location of simple squamous epithelium:
Lines BV's, lymph vessels, and heart.
Location of simple cuboidal epithelium:
Lines salivary glands ducts
Location of Simple Columnar epithelium (ameloblasts)
- Lines salivary glands ducts
- Inner enamel epithelium
Location of Pseudostratified epithelium:
Lines the upper respiratory tract
Location of stratified squamous epithelium*
Superficial oral mucosa
Location of keratinized stratified squamous epithelium*
Superficial skin - epidermis
*stratified epithelium is classified by the outermost layer which is almost always _________.
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