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Basic tissues Simple epithelia Dr. Károly Altdorfer.

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Presentation on theme: "Basic tissues Simple epithelia Dr. Károly Altdorfer."— Presentation transcript:

1 Basic tissues Simple epithelia Dr. Károly Altdorfer

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8 Basic tissues Simple epithelia Dr. Károly Altdorfer

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10 Organs (stomach, eyeball)  Tissues (epithelia, …)  Cells

11 Stainings: Red (acidophil, eosinophil) Blue (basophil) Most common: Hematoxylin-eosin (H-E)

12 Basic tissues

13 Types of epithelia 1.Covering epithelia 2.Glandular epithelia 3.Pigment epithelia 4.Sensory epithelia 5.(Myoepithelium) Epithelial tissue is composed of tightly packed cells.

14 Functions of epithelial cells: -protection of the internal environment (mechanical+biological) -resorption, excretion of materials -secretion Epithelial tissue

15 Simple epithelia

16 Simple squamous epithelium (endothelium, mesothelium, epithelium)

17 Simple squamous epithelium (mesothelium, AgNO 3 impr.)

18 Simple cuboidal epithelium

19 Simple columnar epithelium

20 Pseudostratified columnar epithelium (epididymis)

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22 Apical Lateral Basal cell surfaces

23 Apical Lateral Basal cell surfaces

24 Apical surface: microvilli (cuticle – brush border - stereocilia)

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27 Apical Lateral Basal cell surfaces

28 Apical surface: microvilli, cilia - Tight junctions (diffusion barrier) - (mechanical barrier) or Macula adherens (strong cell junction) (cell connections: transport) Lateral surface:

29 Apical surface Lateral surface:

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31 Zonula occludens (tight junction)

32 Desmosome or Macula adherens

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34 Apical Lateral Basal cell surfaces

35 Basal striation

36 Basal membrane = basal lamina + fibroreticular lamina (Light microscope electrone microscope)

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