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Simple squamous - location
- lining of bvs
- lining of heart
- lymphatic vessels
- serosae
- kidney glomeruli (Bowman's capsule)
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Simple cuboidal - location
- kidney tubules (PCT)
- ducts and secretory portions of small glands
- ovary surface
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simple squamous - function
- diffusion
- filtration
- reduces frictional surfaces
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simple cuboidal - function
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simple columnar - location
- small bronchi
- uterine tubes
- some regions of the uterus
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simple columnar - function
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what cells are cilia found on? why?
simple columnar - helps move substances through internal passageways
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stratified squamous - location
- Keratinized: Forms the external part of the skin's epidermis
- Non-keratinized: lines the esophagus, mouth, vagina
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stratified squamous - function
protection of underlying areas subjected to abrasion
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stratified cuboidal - location
- some sweat glands and mammary glands
- RARE
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stratified columnar - location
- pharynx
- male urethra
- lining some glandular ducts
- transition areas between two other types of epithelia
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pseudostratified columnar epithelial - location
- male sperm-carrying ducts (non-ciliated)
- trachea (ciliated)
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pseudostratified columnar epithelial - function
secretion and propulsion of mucus (via goblet cells)
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transitional epithelial - location
- lines the urinary bladder
- ureters
- part of the urethra
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transitional epithelial - function
stretches to permit the distension of the urinary bladder.
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simple squamous - nuclei characteristic
disc-shaped, protrudes apically
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simple cuboidal - nuclei characteristics
Spherical, central nuclei
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Simple columnar - nuclei characteristics
oval nuclei located more towards the basal membrane
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pseudostratified columnar - nuclei characteristics
seen at different layers
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def: benign
nonmalignant neoplasm
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der: malignant
uncontrollable growth and dissemination or recurrence after removal
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def: carcinoma
malignant neoplasm derived from epithelial tissue
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def: adenocarcinoma
a malignant neoplasm of epithelial cells in glandular or gland-like pattern
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ef: metastasis
the appearance of neoplasms in parts of the body remote from the site of the primary tumor.
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What type of epithelial cells may be ciliated?
- simple columnar
- non-ciliated: digestive tract, gallbladder
- ciliated: small bronchi, uterine tubes, some regions of the uterus
- cilia help move substances through internal passageways
- pseudostratified columnar:
- non-ciliated: sperm-carrying ducts
- ciliated: trachea
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What type of cells appear polygonal on a surface view?
Simple cuboidal
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What type of cell is involved in gas exchange?
simple squamous in the alveoli of the lung
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what type of cell lines the ventral surface of organs?
simple squamous which makes up mesothelium.
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what type of cell asts as a lubricating membrane for the lung and heart?
simple squamous
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What type of cell aids in absorption in the tubules in the renal cortex?
simple cuboidal
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what type of cell aids in secretion in the salivary glands?
simple cuboidal
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what type of cell aids in absorption in the gallbladder?
simple columnar (non-ciliated)
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what type of cell aids in transportation and absorption with cilia, lining the lumen of the intestine?
simple columnar (ciliated)
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What type of cell aids in protection and secretion, lining the vagina, esophagus, and mouth?
stratified squamous (non-keratinized)
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what type of cell aids in protection in its keratinized form?
stratified squamous - epidermis of the skin
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function of tight junctions
- intercellular jucntions that maintain cell adhesion and communication between adjacent epithelial cells.
- lateral surfaces
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function of occludin
forms a belt around adjacent cells
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function of desomosomes
these plaques are distributed along the lateral surface of adjacent epithelial cells, and maintani cell adhesion
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function of gap junctions
- allows passage of aa, ions, and small proteins between adjacent cells (less than 1kDa).
- Important in cardiac muscle, allowing movement of calcium ions.
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The lumen of the trachea is covered by what type of cell?
pseudostratified ciliated columnar epithelium
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the lumen of the small intestine, gall bladder, and colon are covered with what type of cell?
simple columnar epithelium
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the kidney tubular ducts are lined by what type of epithelium?
simple cuboidal epithelium
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keratinized stratified squamous epithelium is found where?
the skin
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non-keratinized stratified squamous epithelium is found where?
mouth, esophagus, vagina
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What are papillae? Why are they important?
- projections of the underlying connective tissue that carry nutrients up to the basement membrane separating the connective tissue from the epithelial tissue.
- important because epithelial tissue does not contain blood vessels.
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the salivary glands contain what type of cells?
stratified cuboidal and stratified columnar epithelium
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the lumen of the urinary bladder is composed of what type of epithelium?
transitional epithelium
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