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What is epithelial tissue?
Sheets of cells that cover and line other tissues
Organized into tight packed groups that form sheets each cell in polar
Cells are avascular
What is the job of the epithelial tissue?
protects/covers/and lines
Filters biochemical substances
Absorb nutrients
Provides sensory input
Manufactures secretions/excretions
What are the classifications of epithelial tissue
number of layers of cells (simple or stratified)
Shape of cells (squamous, cuboidal, or columnar)
Presence of surface specialization (cilia, keratin)
Facts about simple squamous epi
delicate and thin
Flat and smooth
Found lining surface of either gas or liquid
Facts about simple cubodial epi