TISSUE AGGREGATE OR GRROUPS OFCELLS ORGANIZED TO PERFORM    SPECIFIC FUNCTIONS
FOUR BASIC TISSUES• EPITHELIUM  COVERING & LINNING MEMBRANES• CONNECTIVE TISSUE  SUPPORTIVE TISSUE• MUSCULAR TISSUE  CONTR...
EPITHELIUM• LAYER/LAYERS OF CLOSELY  APPOSED CELLS WITH LITTLE INTER  CELLULAR MATERIAL RESTING ON A  BASEMENT MEMBRANE
CHARACTERISTICS• POLARITY APICAL LATERAL & BASAL  DOMAINS• BASEMENT MEMBRANE• SPECIALIZED CELL JUNCTIONS• AVASCULARITY• IN...
CLASSIFICATION• NUMBER OF CELL LAYERS     SIMPLE EPITHLIUM     STRATIFIED EPITHLIUM• MORPHOLOGY OF SURFACE CELLS    SQUAMO...
SIMPLE SQUAMOUS               EPITHLIUM• Thin flat scale like cells• Width > height• Central bulging nucleus surrounded by...
SIMPLE CUBOIDAL            EPITHELIUM•   HEIGHT =WIDTH•   CENTRAL ROUND NUCLEUS•   EQUAL AMOUNT OF CYTOPLASM•   LINNING OF...
SIMPLE COLUMNAR          EPITHELIUM• HEIGHT > WIDTH• OVAL BASAL NUCLEUS• SECRETORY & ABSORPTIVE  EPITHLIEM• WITHOUT SURFAC...
SIMPLE COLUMNAR CILIATED          EPITHLIUM• COLUMNAR CELLS WITH CILIA ON THE  APICAL SURFACE• CAPABLE OF MOVING FLUID & P...
CILIA   Motile extension of cytoplasm covered by cell membrane   Light microscopic   Microtubules   central pair & 9 d...
CENTRIOLES• Paired short rod like cylinders• Nine triplet microtubules surrounding an  internal lumen• Perpendicular to ea...
COLUMNAR EPITHELIUM WITH       MICROVILLI• FINGER LIKE E/M PROJECTIONS OF  THE CYTOPLASM COVERED BY CELL  MEMBRANE• Striat...
MICROVILLI• E/M• ACTIN CORE• ANCHORED  APEX VILLIN  BASE TERMINAL WEB  SIDES FASCIN & FIMBRINTERMINAL WEB actin filament s...
STEROCILIA• MISNOMER• LONG MICROVILLI• EPIDIDYMIS VAS DEFERENCE INNER EAR• THICK STEM CONNECTED BY CYTOPLASMIC  BRIDGES• V...
GOBLET CELL• UNICELLULAR GLAND• Mucous producing (viscous suspension of  complex glycoproteins)• Dilated upper part vacuol...
SENSORY EPITHELIUM• Neuro epithelial cells• Epithelial in otigin with specialized sensory  functions• Taste bud , olfactor...
MYOEPITHELIAL CELLS• Epithelial in origin• Contractile apparatus• Between secretory cells and basement  membrane
Tissue part 1
Tissue part 1
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Tissue part 1
Tissue part 1
Tissue part 1
Tissue part 1
Tissue part 1
Tissue part 1
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Tissue part 1
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Tissue part 1

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Tissue part 1

  1. 1. TISSUE AGGREGATE OR GRROUPS OFCELLS ORGANIZED TO PERFORM SPECIFIC FUNCTIONS
  2. 2. FOUR BASIC TISSUES• EPITHELIUM COVERING & LINNING MEMBRANES• CONNECTIVE TISSUE SUPPORTIVE TISSUE• MUSCULAR TISSUE CONTRACTILE TISSUE• NERVOUS TISSUE EXCITABILITY
  3. 3. EPITHELIUM• LAYER/LAYERS OF CLOSELY APPOSED CELLS WITH LITTLE INTER CELLULAR MATERIAL RESTING ON A BASEMENT MEMBRANE
  4. 4. CHARACTERISTICS• POLARITY APICAL LATERAL & BASAL DOMAINS• BASEMENT MEMBRANE• SPECIALIZED CELL JUNCTIONS• AVASCULARITY• INNERVATION• RENEWAL OF CELLS• METAPLASIA
  5. 5. CLASSIFICATION• NUMBER OF CELL LAYERS SIMPLE EPITHLIUM STRATIFIED EPITHLIUM• MORPHOLOGY OF SURFACE CELLS SQUAMOUS, CUBOIDAL COLUMNAR
  6. 6. SIMPLE SQUAMOUS EPITHLIUM• Thin flat scale like cells• Width > height• Central bulging nucleus surrounded by attenuated cytoplasm (few organelles)• Specific names in specific locations endothelium, mesothlium• Transverse section mosaic like with irregular or straight boundries• Functions passive exchange ( endothelium, lungs) reducing friction( mesothelium) barrier( junctions)
  7. 7. SIMPLE CUBOIDAL EPITHELIUM• HEIGHT =WIDTH• CENTRAL ROUND NUCLEUS• EQUAL AMOUNT OF CYTOPLASM• LINNING OF PASSAGES• ABSORPTIVE & SECRETORY FUNCTION
  8. 8. SIMPLE COLUMNAR EPITHELIUM• HEIGHT > WIDTH• OVAL BASAL NUCLEUS• SECRETORY & ABSORPTIVE EPITHLIEM• WITHOUT SURFACE SPECIALIZATION – ( STOMACH)• SURFACE SPECIALIZATION MICROVILLI, CILIA, GOBLET CELLS
  9. 9. SIMPLE COLUMNAR CILIATED EPITHLIUM• COLUMNAR CELLS WITH CILIA ON THE APICAL SURFACE• CAPABLE OF MOVING FLUID & PARTICLES ALONG EPITHELIAL SURFACE• CREWCUT APPEARANCE short fine hair on the free surface & a dark staining band extending across the cell at the base of cilia due to presence of basal bodyBRONCHI OVIDUCT
  10. 10. CILIA Motile extension of cytoplasm covered by cell membrane Light microscopic Microtubules central pair & 9 doublet Central pair (central sheath, radial spokes) doublet (2 tubules) A complete, B incomplete 13+10 Dyenin ( motor protein) nexin ( passive elastic componet permanet) Basal body modified centriole Cilia develop from procentrioles Regular synchronous movement effective & recovery strokes Kartegnar syndrome
  11. 11. CENTRIOLES• Paired short rod like cylinders• Nine triplet microtubules surrounding an internal lumen• Perpendicular to each other`• Centrosome• Function Basal body formation, Mitotic spindle, microtubule formation
  12. 12. COLUMNAR EPITHELIUM WITH MICROVILLI• FINGER LIKE E/M PROJECTIONS OF THE CYTOPLASM COVERED BY CELL MEMBRANE• Striated & Brush border• Number variable• L/M faint line• Absorptive• Intestine ,Kidney
  13. 13. MICROVILLI• E/M• ACTIN CORE• ANCHORED APEX VILLIN BASE TERMINAL WEB SIDES FASCIN & FIMBRINTERMINAL WEB actin filament stabilized spectrin also contains myosin II & tropomyosin
  14. 14. STEROCILIA• MISNOMER• LONG MICROVILLI• EPIDIDYMIS VAS DEFERENCE INNER EAR• THICK STEM CONNECTED BY CYTOPLASMIC BRIDGES• VILLIN ABSENT• ERZIN REPLACES MYOSIN I• ALPHA ACTININ
  15. 15. GOBLET CELL• UNICELLULAR GLAND• Mucous producing (viscous suspension of complex glycoproteins)• Dilated upper part vacuolated• stem like base( organelles)• Intestinal & respiratory epithelium
  16. 16. SENSORY EPITHELIUM• Neuro epithelial cells• Epithelial in otigin with specialized sensory functions• Taste bud , olfactory epithelium
  17. 17. MYOEPITHELIAL CELLS• Epithelial in origin• Contractile apparatus• Between secretory cells and basement membrane

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