Laboratory 8: Epithelial Tissues Flashcards
What is the study of tissues called?
Histology.
What are the four major types of tissues?
Epithelial, Connective, Muscle, Nervous.
Where would you find epithelial tissue?
Cover’s most of the body’s external and internal surfaces and compromise most glands.
What is the main function of connective tissue?
It binds and supports parts of the body.
What is the function of nervous tissue?
Conducts impulses from one part of the body to another and helps to control and coordinate body activities.
What is the function of muscle tissue?
Makes movements possible.
What do the cells of epithelial tissue do when they are closest to the basement membrane?
Readily divide.
What is a result from epithelial tissue being avascular?
Avascular (lack of blood cells)
Because they are avascular they rely on the vascularity of underlying connective tissue for nourishment and waste removal.
What are the functions of epithelial tissues?
The functions of epithelial tissue include protection, filtration, secretion and absorption.
What is a longitudinal cut?
Lengthwise cut. —-
What is a cross section cut?
Cut across. | | | |
What is an oblique section cut?
Angular cuts. /
Describe simple squamous epithelium:
Single layer of flattened cells.
Describe simple cubiodal epithelium:
Single layer of cubed shaped cells.
Describe simple columnar epithelium?
Single layer ; elongated narrow cells. Some cilliated.
Describe pseudostratified columanr epithelium
Single layer ; elongated cells some do not reach surface. Often cilliated.
Describe stratified squamous epithelium? ( Non keratinized)
Many layers, surface cells flattened and REMAIN alive.
Describe stratified squamous epithelium? (KERATINIZED)
Many layers, surface cells dead and keratinized.
Describe stratified cubodial epithelium
2 to 3 layers, cube shaped cells.
Locations of stratified squamous epithelium (KERATINIZED)
Epidermis of skin.
Describe stratified columnar epithelium
Superfical layer of elongated cells; basal layer of cube shaped cells.
Describe transitional epithelium
Many layers; cube shaped and elongated cells; thinner layers when stretched.
Describe glandular epithelium?
Unicellular or multicellular
What are the functions of epithelial tissue?
1) protection
2) absorption
3) secretion
4) excretion
5) sensation
6) contraction
What is sescap?
protection
2) absorption
3) secretion
4) excretion
5) sensation
6) contraction
consists of several layers of cubeshaped elongated and irregular cells, allowing an expandable lining
Transitional Epithelium
Commonly possesses cilia that move dust and mucus out of the respiratory airways
Pseudostratified columnar epithelium.
single layer of flattened cells
Simple squamous epithelium
single row of elongated cells, but some cells don’t reach the free surface
Pseudostratified columnar epithelium.
forms walls of capillaries and air sacs of lungs
simple squamous epithelium
provides lining of urethra of males and parts of pharynx
stratified columnar epithelium
forms inner lining of urinary bladder and ureters
transitional epithelium
lines kidney tubules and ducts of salivary glands
simple cuboidal epithelium
forms lining of stomach and intestines
simple columnar epithelium
two or three layers of cube-shaped cells
stratified cuboidal epithelium
forms lining of oral cavity, anal canal, and vagina
stratified squamous epithelium
Posesses microvilli in small intestine to increase surface area for better absorption
Simple columnar epithelium
