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Page 1 Epithelial Tissues Institute of Life Long Learning, University of Delhi 0 Lesson: Epithelial Tissues Lesson Developer: Dr. Zubeda Department: Department of Zoology, Page 2 Epithelial Tissues Institute of Life Long Learning, University of Delhi 0 Lesson: Epithelial Tissues Lesson Developer: Dr. Zubeda Department: Department of Zoology, Epithelial Tissues Institute of Life Long Learning, University of Delhi 1 Table of Contents • Introduction • Features of Epithelial Tissue • Locations of Epithelial Tissues • Generalized Functions of Epithelia • Structure of Epithelial Tissue 1. Epithelial Surfaces 2. Intercellular Connections 3. Basement Membrane • Renewal And Repair of Epithelial Tissue • Classification of Epithelial Tissues • The cells layers • The shapes of the cells • Lining And Covering Epithelia • Classification Of Lining And Covering Epithelia • SIMPLE SQUAMOUS EPITHELIA • SIMPLE CUBOIDAL EPITHELIA • SIMPLE COLUMNAR EPITHELIA • Non-ciliated Simple Columnar Epithelia • Ciliated Simple Columnar Epithelia • PSEUDOSTRATIFIED COLUMNAR EPITHELIA • STRATIFIED SQUAMOUS EPITHELIA • Non-keratinised stratified epithelium • Keratinised stratified epithelium • STRATIFIED CUBOIDAL EPITHELIA • STRATIFIED COLUMNAR EPITHELIA • TRANSITIONAL EPITHELIA • Glandular epithelium • ENDOCRINE GLANDS • EXOCRINE GLANDS • Structural Classification Of Exocrine Glands (i) Unicellular Exocrine Glands (ii) Multicellular Exocrine Glands • TYPES OF SECRETION (i) Merocrine secretion Page 3 Epithelial Tissues Institute of Life Long Learning, University of Delhi 0 Lesson: Epithelial Tissues Lesson Developer: Dr. Zubeda Department: Department of Zoology, Epithelial Tissues Institute of Life Long Learning, University of Delhi 1 Table of Contents • Introduction • Features of Epithelial Tissue • Locations of Epithelial Tissues • Generalized Functions of Epithelia • Structure of Epithelial Tissue 1. Epithelial Surfaces 2. Intercellular Connections 3. Basement Membrane • Renewal And Repair of Epithelial Tissue • Classification of Epithelial Tissues • The cells layers • The shapes of the cells • Lining And Covering Epithelia • Classification Of Lining And Covering Epithelia • SIMPLE SQUAMOUS EPITHELIA • SIMPLE CUBOIDAL EPITHELIA • SIMPLE COLUMNAR EPITHELIA • Non-ciliated Simple Columnar Epithelia • Ciliated Simple Columnar Epithelia • PSEUDOSTRATIFIED COLUMNAR EPITHELIA • STRATIFIED SQUAMOUS EPITHELIA • Non-keratinised stratified epithelium • Keratinised stratified epithelium • STRATIFIED CUBOIDAL EPITHELIA • STRATIFIED COLUMNAR EPITHELIA • TRANSITIONAL EPITHELIA • Glandular epithelium • ENDOCRINE GLANDS • EXOCRINE GLANDS • Structural Classification Of Exocrine Glands (i) Unicellular Exocrine Glands (ii) Multicellular Exocrine Glands • TYPES OF SECRETION (i) Merocrine secretion Epithelial Tissues Institute of Life Long Learning, University of Delhi 2 (ii) Apocrine secretion (iii) Holocrine secretion • Summary • Exercises • Glossary • References Page 4 Epithelial Tissues Institute of Life Long Learning, University of Delhi 0 Lesson: Epithelial Tissues Lesson Developer: Dr. Zubeda Department: Department of Zoology, Epithelial Tissues Institute of Life Long Learning, University of Delhi 1 Table of Contents • Introduction • Features of Epithelial Tissue • Locations of Epithelial Tissues • Generalized Functions of Epithelia • Structure of Epithelial Tissue 1. Epithelial Surfaces 2. Intercellular Connections 3. Basement Membrane • Renewal And Repair of Epithelial Tissue • Classification of Epithelial Tissues • The cells layers • The shapes of the cells • Lining And Covering Epithelia • Classification Of Lining And Covering Epithelia • SIMPLE SQUAMOUS EPITHELIA • SIMPLE CUBOIDAL EPITHELIA • SIMPLE COLUMNAR EPITHELIA • Non-ciliated Simple Columnar Epithelia • Ciliated Simple Columnar Epithelia • PSEUDOSTRATIFIED COLUMNAR EPITHELIA • STRATIFIED SQUAMOUS EPITHELIA • Non-keratinised stratified epithelium • Keratinised stratified epithelium • STRATIFIED CUBOIDAL EPITHELIA • STRATIFIED COLUMNAR EPITHELIA • TRANSITIONAL EPITHELIA • Glandular epithelium • ENDOCRINE GLANDS • EXOCRINE GLANDS • Structural Classification Of Exocrine Glands (i) Unicellular Exocrine Glands (ii) Multicellular Exocrine Glands • TYPES OF SECRETION (i) Merocrine secretion Epithelial Tissues Institute of Life Long Learning, University of Delhi 2 (ii) Apocrine secretion (iii) Holocrine secretion • Summary • Exercises • Glossary • References Epithelial Tissues Institute of Life Long Learning, University of Delhi 3 Learning objectives: • To describe the basic characteristics of epithelial tissues • Discuss the essential functions of epithelial tissues • Describe the structure of epithelial tissues • Classify the lining and covering epithelial tissue • List the location, structure, and function of each different type of epithelial tissues • Classify the glandular epithelial tissue Introduction Although there are trillions of individual cells in the human body, only 200 types of cells are found and specialized for different functions. The tissues are formed from collections of these specialized cells and cell products which carry out a limited number of functions. All of the structures of the human body are formed from various combinations of these 4 fundamental tissue types, i.e. epithelial, connective, muscle, and neural tissues (Fig. 1). Among these four basic tissue types in the body of human, epithelial cells are certainly the most prolific. Epithelial tissue covers body surfaces, covers cavities and tubular structures inside body, therefore, it plays important roles in our body. Page 5 Epithelial Tissues Institute of Life Long Learning, University of Delhi 0 Lesson: Epithelial Tissues Lesson Developer: Dr. Zubeda Department: Department of Zoology, Epithelial Tissues Institute of Life Long Learning, University of Delhi 1 Table of Contents • Introduction • Features of Epithelial Tissue • Locations of Epithelial Tissues • Generalized Functions of Epithelia • Structure of Epithelial Tissue 1. Epithelial Surfaces 2. Intercellular Connections 3. Basement Membrane • Renewal And Repair of Epithelial Tissue • Classification of Epithelial Tissues • The cells layers • The shapes of the cells • Lining And Covering Epithelia • Classification Of Lining And Covering Epithelia • SIMPLE SQUAMOUS EPITHELIA • SIMPLE CUBOIDAL EPITHELIA • SIMPLE COLUMNAR EPITHELIA • Non-ciliated Simple Columnar Epithelia • Ciliated Simple Columnar Epithelia • PSEUDOSTRATIFIED COLUMNAR EPITHELIA • STRATIFIED SQUAMOUS EPITHELIA • Non-keratinised stratified epithelium • Keratinised stratified epithelium • STRATIFIED CUBOIDAL EPITHELIA • STRATIFIED COLUMNAR EPITHELIA • TRANSITIONAL EPITHELIA • Glandular epithelium • ENDOCRINE GLANDS • EXOCRINE GLANDS • Structural Classification Of Exocrine Glands (i) Unicellular Exocrine Glands (ii) Multicellular Exocrine Glands • TYPES OF SECRETION (i) Merocrine secretion Epithelial Tissues Institute of Life Long Learning, University of Delhi 2 (ii) Apocrine secretion (iii) Holocrine secretion • Summary • Exercises • Glossary • References Epithelial Tissues Institute of Life Long Learning, University of Delhi 3 Learning objectives: • To describe the basic characteristics of epithelial tissues • Discuss the essential functions of epithelial tissues • Describe the structure of epithelial tissues • Classify the lining and covering epithelial tissue • List the location, structure, and function of each different type of epithelial tissues • Classify the glandular epithelial tissue Introduction Although there are trillions of individual cells in the human body, only 200 types of cells are found and specialized for different functions. The tissues are formed from collections of these specialized cells and cell products which carry out a limited number of functions. All of the structures of the human body are formed from various combinations of these 4 fundamental tissue types, i.e. epithelial, connective, muscle, and neural tissues (Fig. 1). Among these four basic tissue types in the body of human, epithelial cells are certainly the most prolific. Epithelial tissue covers body surfaces, covers cavities and tubular structures inside body, therefore, it plays important roles in our body. Epithelial Tissues Institute of Life Long Learning, University of Delhi 4 Fig. 1. Four basic types of tissues are illustrated in nervous tissue, epithelial (stratified squamous) tissue, cardiac muscle tissue, and connective tissue in small intestine. Source: http://cnx.org/contents/cdf9ebbd-b0fe-4fce-94b4-512f2a574f18@3 CC Image Credit: CC BY-SA 3.0 Features of Epithelial TissueRead More
1. What are epithelial tissues? |
2. What are the functions of epithelial tissues? |
3. How are epithelial tissues classified? |
4. What are the different types of epithelial tissues? |
5. How do epithelial tissues adapt to their functions? |
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