Chapter 4: Epithelial Tissue Flashcards
(30 cards)
2 forms of epithelium
Cover + lining epithelium and glandular epithelia
5 distinguishable characteristics of epithelium
Polar, specialized contacts, supported by connective tissues, avascular, regeneration
Simple
1 layer
Stratified
2 or more layer
Psuedostratified
1 layer, different shapes
Squamous
Flattened, sac-like
Cuboidal
box-like, cube
Columnar
tall, column like
What organs have pseudostratified columnar tissue?
Respiratory larynx and trachea (ciliated)
Membranous urethra (non ciliated)
Nose
What organs have simple columnar tissue?
Female cervix (endocervix) Fallopian tubes (ciliated) Stomach (non-ciliated)
What organs have simple cuboidal tissue?
Kidney tubules
Bronchioles (ciliated)
What organs have Simple squamous tissue
Blood vessels
Air sacs of lungs
What organs have stratified squamous tissue?
Dorsum of tongue
Skin (keratinized)
Veginal epithelium (non-keratanized)
What organs have transitional tissue?
Ureter
Urinary bladder
Glandular Epithelia
one or more cells that makes and secrets an aqueous fluid called a secretion
Endocrine Glands
- ductless
- released into surrounding interstitial fluid which is picked up by the circulatory system
- these glands secrete hormones (by exocytosis)
- secretes product into ducts
- secretions are released by body surfaces such as skin, or into body cavities
Exocrine Glands
Merocrine glands
secrete their products by exocytosis
Holocrine glands
The entire cell ruptures, releasing secretion+dead cell fragments
Apocrine glands
release contents along with a little bit of cytoplasm
What cavities do epithelial tissue cover?
urogenital, digestive, and respiratory
What else does epithelial tissue cover?
the walls and organs of the closed ventral body cavities
An upper free surface exposed to the body exterior
Apical
Fingerlike extensions of the plasma membrane
Microvilli
