Chap 4 (bio 5) Flashcards
what are the four major types of tissue
epithelial
connective
muscle
nervous
a collection of specialized cells of similar structure that perform common functions
tissues
cells that line or cover all body surfaces, have no blood supply (avascular) tightly packed together, and are usually always found next to a connective tissue, they also helps to form glands.
epithelial tissue
epithelial tissues that synthesizes and secretes a protein
gland
two types of glands in epithelial tissue
exocrine and endocrine
these glands have a duct, secrete their products that empty on the surface of the skin, or lumen of an organ
Exocrine
EX: sweat glands
These glands are ductless and secrete hormones directly into the blood stream.
Endocrine
how are epithelium tissue classified
by how many layers and by their shape
there are three classifications of layers in epithelium tissue in
simple
stratified
psuedostratified
single layer of epithelial tissue
simple
multiple layers of epithelial tissue
stratified
appears to be multiple layers but is actually just one layer of cells
psuedostratified
there are three classifications of shape in epithelium tissue
squamous
cuboidal
columnar
flat, squishy, squashy are called
squamous
cube like are called
cuboidal
long and thin are called
columnar
one layer of flat and thin tissue is called
simple squamous epithelium
what is the function of simple squamous epithelium
filtration and diffusion
what is the location of simple squamous epithelium
lines blood vessels, alveoli of lungs, and heart
one layer of long and thin tissue is called
simple columnar epithelium
what is the function of simple columnar epithelium
secretion and absorption
what is the location of simple columnar epithelium
digestive tract and uterine tubes
these are found in exocrine glands and they secrete mucus
goblet cells
there are two varieties of simple columnar EPI
ciliated and non-ciliated
what is the difference between ciliated and non-ciliated
ciliated have hair-like projectiles on the surface that move things.
where do you find the non-ciliated simple columnar epithelium
in the digestive tract where propulsion is already in place and so the cilia is not needed
where do you find the ciliated simple columnar epithelium
in the uterine where they provide propulsion
This tissue looks layered but is actually a single layer that contains lots of goblet cells and lots of cilia that traps things and moves it up and out,
Psuedostratified ciliated columnar EPI
what is the function of Psuedostratified ciliated columnar EPI
to produce mucous and propels it out of the body
Where is Psuedostratified ciliated columnar EPI located
Upper respiratory tract
This tissue is multiple layered and flat EPI
stratified squamous EPI
what is the function of stratified squamous EPI
protection
there are two kinds of stratified squamous EPI
Keratinized and non-keratinized
What is the difference between keratinized and non-keratinized
keratinized contains the protein keratin which is a protein that adds water proofing.
where do you find non-keratinized stratified squamous
lining the mouth, esophagus, and vagina
where do you find keratinized stratified squamous
epidermis