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...

    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..

    Lotic community of algal species
    Lotic Communities & Algae

    Lotic communities have conditions that are rather harsh for typical plants. Thus, the diversity of plant species in loti..

    green plant cells
    Plant Cells vs. Animal Cells

    Plant cells have plastids essential in photosynthesis. They also have an additional layer called cell wall on their cell..

    Neurology of Illusions
    Neurology of Illusions

    Illusions are the perceptions and sensory data obtained from situations in which human error prevents us from seeing the..

    Plant meristem
    Plant Meristems and Growth

    In plants, growth occurs in meristems, which are the site of repeated cell division of unspecialized cells. These cells ..

    Genetics and Evolution
    Genetics and Evolution

    Humans are diploid creatures. This means that for every chromosome in the body, there is another one to match it. Howeve..