THE EPITHELIAL TISSUE Prepared by : Reem Aldossari Lab 2 ZOO 103 Structure closely packed cells Specialized to cover external surfaces or line internal cavities. Epithelial cells are packed tightly together, with almost no intercellular
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THE EPITHELIAL TISSUE Prepared by : Reem Aldossari Lab 2 ZOO 103<br>
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Structure closely packed cells
Specialized to cover external surfaces or line internal cavities.
Epithelial cells are packed tightly together, with almost no intercellular spaces and only a small amount of intercellular substance.
Rest on Basement Membrane
thin sheet of connective tissue
provides structural support for the epithelium
binds it to neighboring structures Functions: Protection
Permeability
Sensations
Secretions<br>
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Types of Epithelial Tissue Epithelial tissue can be divided into two groups depending on the number of layers of which it is composes. simple epithelium: which consist of only one layer squamous epithelium cuboidal epithelium columnar epithelium<br>
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Covering “surface” epithelium. Glandular epithelium Neuro_epithium Types of Epithelial Tissue The Simple.
Stratified. epithelium of cells specialized to produce
secretion.
(Goblet cell) Epithelial tissue can be divided into two groups depending on their function of which it is composes.<br>
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Simple epithelium Simple epithelium can be subdivided according to the shape and function of its cells. Squamous epithelium
Squamous cells have the appearance of thin, flat plates.
Squamous cells tend to have horizontal flattenednuclei because of the thin flattened form of the cell.
They form the lining of cavities such as the mouth, blood vessels, heart and lungs and<br>
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Squamous epithelium<br>
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cuboidal cells are roughly square or cuboidal in shape.
Each cell has a spherical central nucleus.
Cuboidal epithelium is found in
glands
lining of the kidney tubules
ducts of the glands Simple Cuboidal Epithelium<br>
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The cells are elongated and column-shaped.
The nuclei are elongated and are usually oval and basal.
Columnar epithelium forms the lining of the stomach and intestines. Simple Columnar Epithelium<br>
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Glandular Epithelium: epithelium of cells specialized to produce secretion. All glands are of composed of epithelium.
columnar and cuboidal epithelial cells. Glandular Epithelium<br>
