A. Functional generalities: Think about as we talk about different systemsC. Simple epithelial tissueD. Stratified epithelial tissueV. Glandular epithelial tissueA. ExocrineEPITHELIAL TISSUESLearning Goals:1) Describe the characteristics of epithelium that distinguish it from other types of tissues.2) Describe structural classifications of epithelial tissue by layering: simple or stratified.3) Illustrate epithelial tissues by shape: squamous, cuboidal, or columnar.4) List epithelial types and their function. 5) Predict which epithelial cell type you would expect to find in an organ given the tissue functions.6) Name the specialized structures associated with the lateral, basal, and apical surfaces of epithelial cells.Outline:I. Special Characteristics of epithelial tissuesA. CellularityB. Cell junctionsC. Polarityi. apical surfaceii. basal surfaceD. Supported by connective tissueE. AvascularF. InnervatedG. RegenerationII. Epithelial cell surface featuresA. Lateral surface featuresi. cell junctions: tight junctions, desmosomes, gap junctionsB. Basal surface featurei. basal laminaC. Apical surface featuresi. microvilliii. ciliaIII. Major categories1. membranous-majority of body coverings & linings2. glandular-specialized tissue for glandular secretions IV. Epithelium (membranous)A. Functional generalities: Think about as we talk about different systems1. if covering or lining surface-->protection from pathogens, physical injury, toxins, dessication2. lining GI tract-->absorption3. kidneys-->filtration4. pulmonary alveoli (lungs)-->diffusion of gases5. taste buds-->chemoreceptionB. Classification system of epithelia based on # of cell layers & shape of cells along apical layeri. # of Layers:1. simple=single layer2. stratified=multiple layersii. Shapes of cells:1. squamous=flattened cell 2. cuboidal=cube shaped3. columnar=tallC. Simple epithelial tissuei. Simple squamous epitheliumii. Simple cuboidal epitheliumiii Simple columnar epitheliumiv. Pseudostratified epithelium (pseudo=false)D. Stratified epithelial tissuei. Stratified squamous epitheliumii. Stratified cuboidal epitheliumiii. Stratified columnar epitheliumiv. Transitional epitheliumV. Glandular epithelial tissueA. Exocrinei. tubular vs. alveolar ii. branched vs. unbranched iii. simple vs. compound*simple = duct does not branch*compound = duct branchesB.