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Eosin & Haematoxylin Pencil

Eosin & Haematoxylin Pencil. Basic tissues & Epithelial tissue. What is tissue?. Name the basic tissues?????. Basic tissues are of 4 types …… Epithelial tissue Connective tissue Muscle tissue Nervous tissue. Epithelial tissue. Epithelium. Epithelium. Simple.

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Eosin & Haematoxylin Pencil

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  1. Eosin & Haematoxylin Pencil

  2. Basic tissues & Epithelial tissue

  3. What is tissue?....

  4. Name the basic tissues?????

  5. Basic tissues are of 4 types…… • Epithelial tissue • Connective tissue • Muscle tissue • Nervous tissue

  6. Epithelial tissue

  7. Epithelium Epithelium Simple Stratified Simple Non keratinized Squamous Squamous Cuboidal Columnar keratinized Transitional Non ciliated columnar Ciliated columnar Brush border columnar Cuboidal Columnar

  8. Squamous epithelium: Nuclei produce bulging of the cell surfaces.

  9. E. g : Alveoli of the lungs. Functions :- Diffusion, secretion, absorption.

  10. Simple squamous epithelium seen under microscope

  11. Cuboidal epithelium :- Nucleus is rounded and placed at the center. e. g : follicles of thyroid gland, ducts of glands.

  12. Cuboidal epithelium :- Functions:- Secretion, absorption, excretion.

  13. Simple cuboidal epithelium seen under microscope

  14. Columnar epithelium:- • Cells are elongated ,with elongated nucleus at the base. • Columnar epithelium without cilia or microvilli . • E. g:- mucous membrane of stomach

  15. Columnar epithelium with cilia (hair like projections): E. g:- respiratory tract, uterine tube.

  16. Columnar epithelium with microvilli arranged regularly (striated border). E. g:- small intestine Columnar epithelium with microvilli arranged in irregular manner (brush border) E. g:- gall bladder

  17. Simple columnar epithelium seen under microscope E. g : mucous membrane of stomach

  18. Pseudo stratified columnar epithelium:- Ciliated or non ciliated. Cells are present on the basement membrane are of different height. Nucleus of cells are at different levels. E. g:- nasal cavity, trachea (ciliated) Functions:- cilia of the cells trap dust.

  19. Seen under microscope Ciliated pseudo stratified columnar epithelium

  20. Stratified epithelium • Multilayered • Wear and tear • Types……….?????

  21. Stratified squamous non keratinized epithelium

  22. Stratified squamous non keratinized epithelium • Basal columnar cells • 3-4 layers of polyhedral cells • Surface layers of squamous cells. • E.g. oral cavity, esophagus, vagina

  23. Stratified squamous keratinized epithelium

  24. Stratified squamous keratinized epithelium • Basal columnar cells • 3-4 layers of polyhedral cells • Surface layers of squamous cells • Dead cells or keratin • E.g. skin

  25. Transitional epithelium (urothelium) Function:- protection and distension

  26. Transitional epithelium (urothelium) • Basal columnar cells • 3-4 layers of pear shaped cells • Topmost layer of facet cells (umbrella shaped) • E.g., urinary bladder, ureter.

  27. Stratified cuboidal epithelium: E. g:- duct of sweat gland Function:- it provides passage for secretion

  28. Stratified columnar epithelium: E. g:- ducts of salivary glands Functions:- provides passage for secretion

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