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Epithelial Tissue Basics - Anatomy & Physiology

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  • What does cellularity mean in epithelial tissue?

    Cellularity means epithelial tissue is made up mostly of cells with very little extracellular fluid (ECF).

  • What is meant by polarity in epithelial tissue?

    Polarity means epithelial tissue has an apical (top) surface and a basal (bottom) surface.

  • What structures are involved in the attachment of epithelial tissue?

    Attachment includes cell junctions and the basement membrane that anchor epithelial cells.

  • Is epithelial tissue vascular or avascular?

    Epithelial tissue is avascular, meaning it lacks blood vessels but is innervated (has nerve supply).

  • What does regeneration mean in the context of epithelial tissue?

    Regeneration refers to the ability of epithelial tissue to recover and replace damaged cells easily.

  • What does it mean that epithelial tissue is innervated?

    Innervated means epithelial tissue has a nerve supply, allowing it to sense stimuli.

  • Why is epithelial tissue considered a protective barrier?

    Because it is avascular and tightly packed with cells, epithelial tissue forms a protective barrier against physical and chemical damage.