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29 terms

Tissues, Glands and Membranes

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epithelium
covers internal and external surfaces
free surface
is not in contact with other cells
basement membrane
attaches the epithelial cells to underlying tissues
Simple
single layer
Stratified
2 or more layers
squamous
flat
cudoidal
cube-like
columnar
tall and thin
simple squamous
normally found in the lung alveoli
simple cuboidal
normally found in the kidney
simple columnar
normally found in the stomach and intestine lining
pseudostratified columnar
normally found in the trachea and bronchi
stratified squamous
normally found in the skin, mouth cornea and esophagus
transitional
normally found in the bladder, urethra, ureter
tight junctions
bind adjacent cells together and form permeability barriers
desmosomes
link that function to bind cell together
hemidesmosomes
anchor cells to the basement membrane
gap junctions
small channels that allow adjacent cells to exchange small molecules
gland
multicellular structure that secretes substances onto a surface, cavity or in the blood
exocrine
glands with ducts
connective tissue
extracellular materials that separate cells from one another
collagen fibers
microscopic ropes that are flexible but can resist stretching
reticular fibers
very fine short collagen fibers
blast
germ
cyte
cell
clast
break
ground substance
shapeless background of the collagen fibers in a microscope
macrophages
large cells that are capable of moving about and ingesing foreign substances
mast cells
release chemicals that promote inflammation