Epithelial Tissue Flashcards
Groups of cells that are similar in structure and perform a common function are called?
Tissue
What are the four(4) major types of tissues?
Epithelial: covering
Connective: support
Muscle: movement
Nervous: control
A sheet of cells that covers a body surface or lines the body cavity is called?
Epithelial tissue
List 5 characteristics of epithelial tissue
Innervation: lots of nerve endings
Cellularity: composed almost entirely of cells
Polarity: specific top and bottom
Avascularity: no blood vessels
High regeneration capacity: they are replaced quickly as they are frequently damaged
Give four (4) functions of epithelial tissue
Physical protection from dehydration, abrasion etc
Selective permeability
Sensation
Secretion
Each epithelium tissue is given how many names?
Two
The first name of epithelial tissue indicates?
The number of cell layers present eg
Simple: one layer
Stratified: more than one layer
The second name of epithelial tissue indicates what?
The shape of the cells eg
Squamous
Cuboidal &
Columnar
The function of simple squamous epithelium is to?
Allow materials to pass through by diffusion and filtration, andsecretes lubricating substances
The locations of simple squamous epithelium include?
Air sacs of the lungs and the lining of the heart, blood vessels and lymphatic vessels
The function of simple cuboidal epithelium is
Secretion & absorption
The locations of simple cuboidal epithelium include?
Kidney tubules
Ovary surface
Ducts and secretory portions of small glands
The function of simple columnar epithelium is?
Secretion of enzymes and mucous
& absorption
The locations of simple columnar epithelium include?
Ciliated tissues including the bronchi, uterine tubes, and uterus; smooth
Nonciliated tissues are in the digestive tract, bladder, gall bladder
The function of pseudostratified columnar epithelium is?
Secretion of mucous; ciliated tissue moves mucous
The locations of pseudostratified columnar epithelium include
Ciliated tissue lines the trachea and much of the upper respiratory tract
Nonciliated type in male’s sperm carrying ducts and ducts of large glands
The function of stratified squamous epithelium is?
Protects against abrasion
The location of stratified squamous epithelium include?
Non keratinized type forms the moist linings of the esophagus, mouth and vagina
Keratinized type forms the epidermis
The function of stratified cuboidal epithelium is?
Protection
The locations of stratified cuboidal epithelium include?
Large ducts of mammary glands, sweat glands and pancreas
Ovarian follicles
Seminiferous tubules
The function of transitional epithelium is to?
Allow the urinary organs to expand and stretch
The locations of transitional epithelium include?
Lines the ureters, bladders and part of the urethra
The location of stratified columnar epithelium is?
The male urethra and the ducts of some glands.
The function of stratified columnar epithelium is
Secretion and absorption
