epithelial tissue Flashcards
what are the 4 groups of tissue cells
epithelial
connective
muscular
nervous
what is the epithelial cells?
covers and lines body surface and cavities
what is the connective cells?
protects and supports
its the blood
carries waste away and nutrients through the body
what is the muscular cells
generates physical force for movement
what is the nervous cells
coordinates body activities
apical surface meaning
always a free surface
cover surfaces and lines cavities
avascular meaning
no blood vessels
innervation meaning
have a nerve supply
simple epithelium have how many layers
1 layer of cells
stratified epithelium layers
more than 1 layer of cells
name some of the stratified cell shapes
squamous
cuboidal
columnar
transitional (change shape)
what is a squamous cell
a single layer of flat cells
important for filtration (kidneys) or diffusion (lungs)
what cell lines the heart blood and lymphatic vessels
endothelium
what does a stratified squamous epithelium cell have
apical (top) layer of cells is flat
Deep layers vary from cuboidal to columnar
Cells in the basal layer divide and move upward toward the apical surface
Found in areas of surface wear & tear
where can you find Simple Squamous Epithelium
small intestine
