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Histology
Epithelial Tissue
31
Histology
Professional
09/20/2011

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Term
What are the 6 characteristics for epithelial tissue?
Definition
Covers and lines body cavities; cells densely packed together; attached by intercellular junctions; basement membrane; avascular; rich nerve supply
Term
What germ layers does does epithelium develop from?
Definition
ectoderm, mesoderm, and endoderm
Term
Where is simple squamous epithelium located?
Definition
bowman's capsule in kidney, blood vessels, lining of body cavities, and alveoli of lungs
Term
What is the function of simple squamous epithelium?
Definition
diffusion
Term
What is the function of simple cuboidal epithelium?
Definition
absorption and secretion
Term
Where is the location of simple cuboidal epithelium?
Definition
convoluted tubules of kidney (absorption); thyroid gland (secretion); germinal epithelium
Term
Where is the location of simple columnar epithelium?
Definition
lining of uterus and uterine tube (ciliated); stomach, small intestine, large intestine, gallbladder
Term
What is the function of simple columnar epithelium?
Definition
absorption and secretion
Term
Where is the location of pseudostratified columnar ciliated epithelium?
Definition
nasal cavity, trachea, bronchi (goblet cells)
Term
What is the function of psuedostratified columnar ciliated epithelium?
Definition
secret mucous to catch dust particles in the air
Term
Where is pseudostratified columnar epithelium with sterocilia located?
Definition
Male reproductive system
Term
What is the function and location of stratified squamous non-keratinized epithelium?
Definition
protection; oral cavity, pharynx, esophagus, vagina
Term
What is the location and function of stratified squamous keratinized epithelium?
Definition
epidermis of the skin (dry)
Term
Where is stratified columnar epithelium located?
Definition
Large ducts of salivary glands, conjunctiva, penile urethra
Term
Where is transitional epithelium located?
Definition
urinary system (calyces of kindey, ureter, urinary bladder, prostatic urethra in males and female urethra)
Term
What are the two types of transitional epithelium?
Definition
Relaxed (4-6 layers) and stretched (2-3 layers)
Term
What are the different types of cell junctions that may be found between epithelial cells (5)?
Definition
tight junction; adherent junction; gap juntion; desmosomes; hemidesmosomes
Term
What are two locations for simple columnar ciliated epithelium and their functions?
Definition
Stomach (secretion) and intestines (absorption)
Term
What is one location for simple columnar epithelium with a brush border?
Definition
(microvilli) found in small intestine
Term
Mention one location for simple cuboidal epithelium with a brush border.
Definition
proximal convoluted tubules of kidney
Term
Where are two locations for goblet cells? and what is its function?
Definition
GI tract and respiratory tract; synthesize and secrete mucous
Term
Where are myoepithelial cells located?
Definition
exocrine glans (lacrimal, salivary, mammary, and sweat glands)
Term
What is the function of myoepithelial cells?
Definition
contain contractile actin proteins that squeezes secretory units and ducts
Term
How are glands formed?
Definition
proliferation of surface cells, downward growth and invasion of underlying CT, differentiation into either exocrine or endocrine
Term
What is an example of a simple coiled tubular gland?
Definition
sweat gland
Term
What is an example of a serous gland?
Definition
parotid salivary gland
Term
What is an example of an apocrine gland?
Definition
mammary glands
Term
What is an example of a holocrine gland?
Definition
sebaceous glands in skin (hair follicles)
Term
What is an example of an eccrine/merocrine gland?
Definition
sweat glands
Term
What is an example of an unicellular gland?
Definition
goblet cell
Term
What is an example of an endocrine gland?
Definition
Thyroid gland
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