Epithelial Flashcards
Collection of similar cells acting together to perform certain functions of combinations of 2 or more tissues to make up organs
tissues
outer layer, lines inside of hollow organs, makes up glands
epithelial
cellularity, free top, anchored with desmosomes and tight junctions, avascular, regenerative
characteristics of epithelial
flat
squamous
cube-shaped
cuboidal
column like
columnar
stretchy and variably shaped
transitional
single layer of same type
simple layer
several layer; named by cell type on outer layer
stratified layer
single layer, flattened, lines blood vessels, inside of heart, walls of capillaries, and feeds tissue and alveoli
simple squamous epithelium
single layer, cube shaped, secretion, kidney tubules and of some glands
simple cuboidal epithelium
gland makes their product and secretes it into the matrix; always a hormone
endocrine
gland secretes its products outside of itself using a duct
exocrine
the three methods used for exocrine secretion
Merocrine, Apocrine, Holocrine secretion
Cells release their product through exocytosis
Merocine secretion
Apex of cells become full of product, pinches off and moves into the duct and finally breaks down releasing the product
Apocrine Secretion
Whole cells becomes full of product and ruptures to release the product
Holocrine secretion
Elongated cells, nuclei are all located near the basement membrane, big absorber, lines uterus/fallopian tubes, stomach and intestines
Simple columnar epithelium
One layer, looks like more than one, nuclei not all on bottom, have cilia and goblet cells, these produce mucin and histamine, sweep debris out of lungs, only found in lining of upper respiratory tract
Psudostratified (false) Columnar epithelium
Flattened layer of cells, wear and tear tissue, made to take lots of low energy friction, exposure to the environment, protection from fluid loss and invasion, outer layer of skin and lines mouth, thoart, vagina, and anal canal
Stratified Squamous Epithelium