Epithelium Flashcards
What are the five primary tissues
-connective
-blood
-muscle
-nervous
-epithelial
Describe the epithelial
Lining of vessels and the gut
Glands and ducts
Skin
Describe muscle
Skeletal
Cardiac
Smooth
Describe nervous tissue
Peripheral nerves PNS
CNS Brain and spinal cord
Describe connective tissue
Within between other tissues
Cartilage bone
Describe blood tissue
Red and white blood cells
What are the features Common in all epithelia
The need for mechanical protection of the skin (maximal) and lung (minimal)
Epithelia is a single layer of flat cells however multiple cell layers
Underneath keratin layer
A) closely packed cells little extra cellular material
B) epithelia rest on basal lamina (basement membrane) and connective tissue therefore they have apical and basal surface
C) many cell to cell junctions desmosomes provide secure attachment and in some epithelia provide a watertight seal.
D) renew rapidly frequent cell divisions
Most cancers occur in epithelia
What are the features Common in all epithelia
The need for mechanical protection of the skin (maximal) and lung (minimal)
Epithelia is a single layer of flat cells however multiple cell layers stratified
Underneath keratin layer
A) closely packed cells little extra cellular material
B) epithelia rest on basal lamina (basement membrane) and connective tissue therefore they have apical and basal surface
C) many cell to cell junctions desmosomes provide secure attachment and in some epithelia provide a watertight seal.
D) renew rapidly frequent cell divisions
Most cancers occur in epithelia
What are the diverse functions of epithelia
Diffusion barrier
Secretion
Absorption
Protection
Apical meaning
Facing lumen/ surface
Basal meaning
Facing basal lamina
List the major types of epithelia
Simple squamous blood vessels
Simple cuboidal ducts of glands
Stratified squamous esophagus skin
Simple columnar with microvilli gut
What are two other types of epithelia
Respiratory epithelia
Urinary epithelium
Where is simple squamous epithelium found
Blood vessels
What epithelium is found in the ducts of glands
Simple cuboidal
