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Types of Epithelial Tissues

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Simple squamous epithelium - definition

  • Flat, thin and scale like cells with no intercellular spaces.
  • Provides mechanical support and transportation of substances through selectively permeable membrane.
  • It is found in the outer layer of the skin, lining of blood vessels, lungs, alveoli, oesophagus, lining of mouth.

Stratified squamous epithelium - definition

  • The cells are arranged in a pattern of layers.
  • They are found in the outer layer of skin and cornea.
  • The major function of this tissue type is protection, as it is found in areas that undergo wear-and-tear.

Columnar epithelium - definition

  • Consists of tall, rectangular or column shaped cells (cylindrical cells). 
  • It is found in the lining of the stomach and intestines.
  • It facilitates the movement of nutrients across the epithelial barrier.

Ciliated columnar epithelium - definition

  • Consists of columnar cells with thread like projections called as cilia. 
  • These cilia push the mucus forward into the nasal tract to clear it.

Cuboidal epithelium - definition

  • Consists of cubical (cube-shaped) cells. 
  • It is found in the lining of the kidney tubules, salivary glands and thyroid glands, where it provides mechanical support.
  • It plays an important role in absorption of useful material and secretion of saliva.

Related Concepts

Introduction to Epithelial Tissues