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epithelial tissue


Groups of closely associated cells that are similar in structure and perform a common function


The study of tissues

Epithelial tissue

Tissue specialised for the covering and lining the body and organs, and glands


Epithelial tissue

Apical surface

The surface of cell exposed to lumen or exterior


The cavity or channel within a tubular structure


Has no blood vessels

Basal lamina

A nonliving adhesive material formed largely of glycoproteins secreted by the epithelial cells

Reticular lamina

Extracellular material containing fine collagenous or reticular fibres secreted by connective tissue cells abutting the basal lamina

Basement membrane

The material formed by the basal and reticular laminae on which epithelial tissue is supported, defining the boundary of epithelial tissue.

Squamous cells

Flattened and scalelike epithelial cells

Cuboidal cells

Epithelial cells that are approximately as tall as they are wide

Columnar cells

Epithelial cells that are tall and column-shaped

Simple epithelium

A single layer of epithelial cells

Stratified epithelium

Multiple cell layers of epithelial cells


Tissues that look like they have more than one layer, but actually don't

Simple Squamous Epithelium

Single layer of thin cells found where filtration or exchange of substances by diffusion takes place


The simple squamous epithelium forming the serosae of the ventral body cavities

Simple Cuboidal Epithelium

Single layer of cuboidal cells found in kidney tubules, ducts of small glands and ovary surface

Simple Columnar Epithelium

Single layer of tall cells found lining most of the digestive tract; may be ciliated

Goblet cell

Unicellular exocrine gland which secretes mucin; found in the digestive tract

pseudostratified epithelium

Single layer of cells of DIFFERING HEIGHTS; found in the male urethra and upper respiratory tract; may be ciliated.

stratified squamous epithelium

Multiple layers of flat cells; found in the mouth, oesophagus and vagina

keratinised stratified squamous epithelium

Multiple layers of flat cells of which the top layers has dead cells filled with keratin; forms the skin


Superficial layer of the skin made up of keratinised stratified squamous epithelium

stratified cuboidal epithelium

Two layers of cube-like cells found in ducts of sweat glands, mammary glands and salivary glands

stratified columnar epithelium

Several layers with the top layer having tall cells; found in small amounts at epithelial junctions in the digestive tract and the conjunctiva.

Transitional epithelium

Multiple layers of cells which appear cuboidal when not stretched, but squamous when stretched; found in the urinary organs

protection, absorption, filtration, secretion

Four functions of epithelial tissues

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