Dictionary > Pseudostratified epithelium

Pseudostratified epithelium

Definition
noun, plural: pseudostratified epithelia
An epithelial tissue comprised of a single layer of epithelial cells that are in direct contact with the basement membrane, however, appear to be stratified due to the positioning of the cells
Supplement
The epithelial tissue (also called epithelium) is one of the different types of animal tissues. It is made up of one or more layers of cells closely packed together. It is primarily involved in protecting the underlying structures, secretion, regulation, and absorption. The epithelium may be classified based on the number of layers that make it up. In particular, the epithelium may be simple or stratified. In comparison, the simple epithelium is composed of a single layer of epithelial cells whereas the stratified epithelium is made up of a multiple layer of epithelial cells. However, there is a special type of epithelium called pseudostratified epithelium.
A pseudostratified epithelium is a simple epithelium. However, because of the manner that the epithelial cells are oriented along the basement membrane the tissue appears to be stratified. The epithelial cells are arranged in a way that the cells seem to be of varying heights but in actuality are about of the same height. The cells are too crowded that the nuclei are disposed at different levels. The pseudostratified epithelium is made up of columnar epithelial cells. It is rare that the cells that make it up are cuboidal or squamous in shape.
A pseudostratified epithelium may be further typified as either ciliated (with cilia) or non-ciliated (lacking cilia). Ciliated pseudostratified epithelium lines the trachea and parts of the upper respiratory tract. As for the non-ciliated type, it is exemplified by the membranous tissue lining the vas deferens.
Also called:

  • pseudostratified epithelial tissue

See also:

  • tissue
  • epithelium
  • Related term(s):


    You will also like...

    Homeostasis by water regulation
    Homeostasis of Organism Water Regulation

    Osmoregulation is the regulation of water concentrations in the bloodstream, effectively controlling the amount of water..

    vitamins
    A Balanced Vitamin Diet – Vitamins A – K

    A balanced diet is essential to a healthy organism. Insufficiency or too much of a particular element or compound, such ..

    IQ, Creativity and Learning
    IQ, Creativity and Learning

    Human intelligence provided the means to utilize abstract ideas and implement reasoning. This tutorial takes a further l..

    Geological Periods
    Geological Periods

    Geological periods is a study guide that cites the different geological periods on Earth's timeline. Each has a brief ov..

    New Zealand - Biodiversity fauna
    New Zealand’s Biodiversity

    Find out more about New Zealand's unique biodiversity by exploring a range of different ecosystems and the key role of s..

    Control of body movement
    Control of Body Movement

    Some of the body movements can be controlled at will, others cannot. The body has a motor program, which is the pattern ..

    Related Articles...

    No related articles found

    See all Related Topics