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Modified from a PowerPoint Presentation. made to accompany. Hole's ... Holocrine release entire cells. Glandular Secretion. Figure 5.11. Glandular Secretion ... – PowerPoint PPT presentation

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Title: Modified from a PowerPoint Presentation made to accompany Holes Human Anatomy and Physiology, 11e by


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Modified from a PowerPoint Presentation made
to accompanyHoles Human Anatomy and
Physiology, 11/e byShier,
Butler, and LewisMcGraw-Hill - publisher
3
Chap. 5 - tissues
  • Al Mina, M.D.
  • Erskine College

4
Tissues
  • Layers or groups of similar cells with a common
    function.
  • Histologystudy of tissues

5
Types of tissue
  • Epithelial
  • Connective
  • Muscle
  • Nerve

6
Epithelial Tissue
  • Functions
  • protection, secretion, absorption, and excretion
  • Generally lines spaces and hollows within the
    body- one surface is free
  • Composed
  • tightly packed cells anchored to a basement
    membrane
  • lacks blood vessels
  • rapidly divide

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How to classify and name Epithelia
  • Thickness of the epithelium
  • Shape of TOP LAYER of cells
  • (the once closest to the lumen)

Lumen
Surface
Thickness (measured in of cell layers)
Basement membrane
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Simple vs stratified
  • One cell layer (no matter how thick) simple
  • More than one cell layer stratified
  • Are all cells touching basement membrane?

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Simple, cuboidal, columnar
  • Look at layer closest to the apical (free)
    surface.
  • Flat squamous
  • Square/cubecuboidal
  • Tall/rectangular columnar

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Simple squamous epithelium
  • single, layer, flat
  • Easy to pass through, therefore common at
    diffusion or filtration sites
  • Alveoli, capillaries, inner lining of blood
    vessels, membranes

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Simple Squamous Epithelium
Figure 5.1
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Simple cuboidal
  • Single layer cube shaped cells nuclei central,
    spherical
  • Involved in secretion and absorption
  • Primarily ducts of glands, kidney tubules,
    thyroid follicles

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Simple Cuboidal Epithelium
Figure 5.2
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Simple columnar
  • Single layer elongated cells all nuclei at same
    level
  • Some have cilia
  • Secretion, absorption digestive, reproductive
    systems
  • Absorptive cells have microvilli to increase
    surface area
  • Associated with goblet cells secrete protective
    mucus

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Simple Columnar Epithelium
Figure 5.3
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Pseudostratified columnar
  • Nuclei are at different levels
  • All cells touch Basement membrane
  • Ciliated, goblet cells present
  • Respiratory tract

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Pseudostratified Columnar Epithelium
Figure 5.5
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Stratified squamous
  • Thick layer, outermost flat
  • Tissue at skin produces keratin for protection
  • Nonkeratinized tissue in mouth, esophagus, anal
    canal

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Stratified Squamous Epithelium
Figure 5.6
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Stratified cuboidal
  • Larger ducts of mammary, sweat, salivary glands,
    assoc. with reproductive

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Stratified Cuboidal Epithelium
Figure 5.7
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Stratified columnar
  • Male urethra, pharynx

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Stratified Columnar Epithelium
Figure 5.8
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Transitional epithelium
  • More stretchable
  • Thick in relaxed state cuboidal cells
  • Also forms protective layer
  • Found in ureters, urinary bladder

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Transitional Epithelium
Figure 5.9a
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Glandular epithelium
  • Cells that produce and secrete substances
  • Exocrine secrete to outside surfaces
    (intestinal tract, skin)
  • Endocrine secrete into blood or tissues
  • Can be single cell or multicelled
  • Multicelled can be simple or compound (branches)

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Mode of secretion
  • Merocrine release by exocytosis
  • Apocrine lose portions of cells
  • Holocrine release entire cells

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Glandular Secretion
Figure 5.11
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Glandular Secretion
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Glandular Secretion
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