Dictionary > Stratified squamous epithelium

Stratified squamous epithelium

Definition
noun, plural: stratified squamous epithelia
A type of stratified epithelium in which the topmost layer is made up of squamous epithelial cells, such as that one found in the outermost layer of the skin and the linings of esophagus, mouth, and vagina
Supplement
A stratified epithelium is an epithelial tissue composed of more than one layer of epithelial cells. It differs from a simple epithelium in a way that the latter consists only one layer of epithelial cells. The basal layer of the stratified epithelium is the only one that is in contact with the basal lamina. The cells in the basal layer divide mitotically resulting in more cells atop the basal layer. The apical cells are regularly replaced by new cells produced through mitosis. The stratified epithelium may be further classified based on the type of cells particularly at the surface: squamous, columnar, or cuboidal.
A stratified squamous epithelium is a stratified epithelium in which the topmost layer is made up of squamous (flattened and scale-like) epithelial cells. The deeper layers may have cuboidal or columnar cells. Some stratified squamous epithelia are heavily keratinized whereas others are slightly or non-keratinized. The keratin is produced by highly specialized type of epithelial cells called keratinocytes. In heavily keratinized epithelium, the keratin filaments become progressively more abundant toward the surface, which on the dry surfaces of the body may consist of a layer of dead corneocytes. Examples of keratinized squamous epithelial tissues include the epidermis of the palm of the hand, the sole of the foot, and the masticatory mucosa. Stratified squamous epithelial surfaces that are slightly (or non-) keratinized are exemplified by the linings of mucosa of the oral cavity, anal canal, ectocervix, foreskin, etc.
This tissue is primarily involved in providing protection against abrasion.
Also called:

  • stratified squamous epithelial tissue

See also:

  • tissue
  • epithelium
  • stratified epithelium


  • You will also like...

    Cell Respiration
    Cell Respiration

    Cell respiration is the process of creating ATP. It is "respiration" because it utilizes oxygen. Know the different stag..

    Chemical composition of the body
    Chemical Composition of the Body

    The body is comprised of different elements with hydrogen, oxygen, carbon, and nitrogen as the major four. This tutorial..

    An artistic depiction of Dunkleosteus fish
    Fish

    The sea was teeming with life. Eventually, through reproduction and continued variation, fish came about. There are over..

    Fossil trilobite imprint in the sediment
    Insects

    There are more species of insects than any other species combined. This surely illustrates that insects have the selecti..

    Circulation
    Circulation

    The circulatory system is key to the transport of vital biomolecules and nutrients throughout the body. Learn about the ..

    primitive arthropods
    Arthropods

    The arthropods were assumed to be the first taxon of species to possess jointed limbs and exoskeleton, exhibit more adva..

    Related Articles...

    No related articles found

    See all Related Topics