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The Functions of Epithelial Tissue
Unit: Cell Structure

The Functions of EpithelialTtissue

Epithelial cells form the covering of all body surfaces, they cover the outside of the body and line all organs and cavities. In its simplest form it consists of a sheet of cells which fit closely together providing protection and preventing loss of fluid.

The Types of Epithelial Tissue

Epithelial cells are classified according to the number of cell layers and the shape of the cells.

IMAGE

NAME

  

DESCRIPTION

Simple Squamous Epithelium.

Single Layer of cells.

Single layer of flat cells with a centrally located nucleus.

Simple Cuboidal Epithelium.

Single layer of cells.

Single layer of cube shaped cells with a centrally located nucleus.

Simple Columnar

Epithelium.

Single layer of cells.

Single layer of rectangular shaped cells with the nucleus located at the base of the cell.

Ciliated Simple Columnar Epithelium.

Single layer of cells.

Single layer of ciliated rectangular shaped cells with the nucleus located at the base of the cell.

Stratified Epithelium.

Multiple layers of cells.

Consists of several layers of cells, with squamous cells in the surface or superficial layers and cuboidal and columnar in the deep layers

Transitional Epithelium.

Multiple layers of cells.

Consists of a multiple layers of cells whose appearance is variable or transitional.

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