epithelial tissues Flashcards
what is tissue?
tissues are composed of cells similar in structure and specialized to perform a specific function for the body
what are the types of tissues
epithelial tissue
connective tissue
muscle tissue
nervous tissue
what is epithelial tissue?
is a sheet of cells that covers a body surfaces or lines a body cavity
covers the outer and inner surfaces of most body organs
covering and lining epithelium
different forms of epithelial tissue
covering and lining epithelium
glandular epithelium
functions of epithelial tissue
protection
secretion
absorption
diffusion
filtration
sensory reception
structural/ special characteristics of epithelia
cellularity
specialized contacts
polarity
support by connective tissue
avascular but innervated
regeneration
a free surface that may be specialized for protection secretion or absorption
epithelial tissue
what are the classifications of epithelia
cell layers
shape of the cells
the two numbers of cell layers
simple
stratified
kinds of cell shape
squamous
cuboidal
columnar
a single layer of thin, flattened cells
simple squamous epithelium
found in areas where secretion or absorption occurs
simple cuboidal epithelium
a single layer of elongated cells
simple columnar epithelium
found in areas where diffusion or filtration occurs
simple squamous epithelium
a single layer of cube-shaped cells
simple cuboidal epithelium
designed for protection, secretion or absorption
simple columnar epithelium
single layer but nuclei situated at different levels in the cell
pseudostratified columnar
syntheaize and secrete mucus on to the free surface and move mucus that contains foreign particles over the surfacenof the free surface and from passages
psuedostratified columnar
many layers of flattened cells
stratified squamous epithelium
2-3 layers of cube shaped cells
stratified cuboidal epithelium
top layer of elongatwd cells lower layers of cube shaped cells
stratified columnar epithelium
many layers of cube- shaped and elongated cells
transitional epithelium
types of epithelial tissues
simple squamous
simple cuboidal
simple columnar
stratified squamous
stratified cuboidal
stratified columnar
pseudostratified columnar
transitional
specialized to produce and secrete chemical substances into ducts or body fluids
glandular epithelium
where do simple squamous epithelium found in body parts
lining of blood vessels and the heart
lymphatic vessels
alveoli of the lungs
portion of kidney tubules
in which body parts can we find simple cuboidal epithelium
surfaces of the ovary, kidney tubules, glands, and their ducts, lining of the terminal brochioles of the lungs
found in vlands and some ducts, bronchioles of lungs, uterus, auditory tubes, stomach intestine, gall bladder, bile ducts and ventricles of the brain
simple columnar epithelium
where can we find the pseudostratified columnar
lining of the nasal cavity, nasal sinuses, auditory tubes, pharynx, trachea and bronchi of lungs
forms the epidermis
stratified squamous epithelium
location of stratified cuboidal epithelium
lining of larger ducts of sweat glandsm salivary gourds and the pancreas
location of stratified columnar
use deferens, port of the urethra and the pharynx
