Epithelium

Function Of simple squamous Epithelial

• To provide structural support for the body
• To produce hormones and enzymes
• To store fat and provide insulation
• The function of simple squamous epithelial is thin, flat irregular shape: most delicate type 1 layer:reduce friction, controls vessel permeability, performs absorption and secretion

Picture of simple squamous epithelium

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function of stratified squamous epithelial tissue

• Thin flat irregular shape: multiple layers

  physical protection against abrasion pathogens and chemical attacks

• control blood vessels

Microvillia & Cillia functions

• Microvilli & Cilia
• Small finger like extensions of the exposed plasma membrane of an epithelial cell for absorption

  cilia-move in a wave lake manner to generate a current proper fluid

• Microvillia & Cillium
• Microvillia & Cillia

Function of Stratified columnar epithelial tissue

• Absorption and excretion
• Support and movement
• Oxygenation and circulation
• Protection and secretion

  multiple layers: protection

Function of transitional epithelial tissue

• Secrete mucus
• Contract and shrink
• Stretch and expand

  Multiple layers: permits repeated cycles of stretching without damage

• Generate electrical impulses

Major cells of epithelial tissue

• Nerve cells
• Epithelial cells-covers, skin and body cavity

  endothelial cells- single layer that forms all blood cells

  mesothelial cells-form a monolayer

  kertainocytes- diving stem cells..> living kertinocytes..> dead kertainoctyes..> those on surface flake

• Muscle cells
• Bone cells

function of epithelial tissue

• Protection, regulation, and acting as a barrier
• Energy production
• Muscle contraction
• Oxygen transport

function of simple cuboidal epithelial

• Support and movement
• Absorption and excretion
• Oxygenation and circulation
• hexagonal box shape w/ circle in middle limited protection secretion & absorption 1 layer: cubodial= wider than squamous cell

Epithelium characteristic

• Composed of cartilage
• Only present in the nervous system
• Found in the bloodstream
• Polarity (apical *top* and basal surface bottom

  cellularity ( Cell junctions)

  attachment (basement membrane)

  Avascularity( no blood vessels)