Epithelial Tissues

Structure| Sqaumous Epithelium| Cubiodal Epithelium| Columnar Epithelium| Stratified Epithelium| Functions of Epithelium|

Structure

Epithelial tissue covers the whole surface of the body. It is made up of cells closely packed and ranged in one or more layers. This tissue is specialised to form the covering or lining of all internal and external body surfaces. Epithelial tissue that occurs on surfaces on the interior of the body is known as endothelium. Epithelial cells are packed tightly together, with almost no intercellular spaces and only a small amount of intercellular substance. Epithelial tissue, regardless of the type, is usually separated from the underlying tissue by a thin sheet of connective tissue; basement membrane. The basement membrane provides structural support for the epithelium and also binds it to neighbouring structures.

Types of Epithelial Tissue

Epithelial tissue can be divided into two groups depending on the number of layers of which it is composes. Epithelial tissue which is only one cell thick is known as simple epithelium. If it is two or more cells thick such as the skin, it is known as stratified epithelium.

Simple epithelium

Simple epithelium can be subdivided according to the shape and function of its cells.

Simple sqaumous epithelium

Simple cuboidal epithelium

Simple columnar epithelium

Ciliated columnar epithelium

Glandular epithelium

Stratified epithelium

Functions of Epithelial Tissue

| epithelial tissue | connective tissue | muscle tissue | nervous tissue |