BiologyTissuesTypes of Epithelium

Types of Epithelium

Table of Contents

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    • Epithelial Tissue Types
      • Simple Squamous Epithelium
      • Columnar epithelium
      • Cuboidal epithelium
      • Glandular epithelium
    • Summary
    • Did You Know?
    • What’s Next?

    In the previous segment, we learned about epithelial tissue. In this segment, we will learn about the types of epithelium in detail.

    What are the types of epithelial tissues?

    There are majorly 4 types of epithelial tissues:

    Simple squamous epithelium

    This type of epithelium has flat cells lying upon the basement membrane. Also known as ‘pavement epithelium’, it is used to diffuse substances across membranes and perform filtration. This epithelium is present in the thinnest surfaces such as the lining of blood capillaries and alveoli and in the inner lining of the mouth.

    Simple squamous epithelium

    Several layers of the squamous epithelium, stacked one above the other form the outermost layer of the skin, are known as stratified squamous epithelium. Thanks to the multiple layers, it prevents the wear and tear of the upper surface of the skin.

    Stratified squamous epithelium

    Columnar epithelium

    This epithelium has a tall, pillar-like structure which gives it a ‘column-like appearance.’ and hence the name columnar epithelium.

    The tall cells help to carry out absorption or secretion and can be located in the

    intestine’s inner lining.

    Columnar epithelium

    Sometimes the cell surfaces of the columnar epithelium may have tiny hair-like projections called cilia. These cilia carry rhythmic movements to move certain non- motile substances. Thus, the ciliated columnar epithelium is found to cover the lining of the respiratory tract. It throws out foreign particles trapped in mucus, which enter the respiratory tract. It is also found in the fallopian tubes of the ‘female

    reproductive system’, where the cilia help to propel the ovum in the forward

    direction

    Cilia

    Cuboidal epithelium

    Cuboidal epithelium is made up of cube-like cells. They provide mechanical support. They are found lining the kidney tubules, in the thyroid, and the ducts of salivary glands.

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